diff --git a/plugins/plugin-search/src/client/composables/index.ts b/plugins/plugin-search/src/client/composables/index.ts
index f8f26ed7..fade3ddb 100644
--- a/plugins/plugin-search/src/client/composables/index.ts
+++ b/plugins/plugin-search/src/client/composables/index.ts
@@ -1,2 +1,9 @@
+/**
+ * Composables Entry Point
+ *
+ * 组合式函数入口
+ *
+ * @module plugin-search/client/composables
+ */
 export * from './locale.js'
 export * from './searchIndex.js'
diff --git a/plugins/plugin-search/src/client/composables/locale.ts b/plugins/plugin-search/src/client/composables/locale.ts
index 7e13589b..8c273cd6 100644
--- a/plugins/plugin-search/src/client/composables/locale.ts
+++ b/plugins/plugin-search/src/client/composables/locale.ts
@@ -1,8 +1,20 @@
+/**
+ * Locale Composable for Search Plugin
+ *
+ * 搜索插件的语言组合式函数
+ *
+ * @module plugin-search/client/composables/locale
+ */
 import type { ComputedRef, MaybeRef } from 'vue'
 import type { SearchBoxLocales, SearchLocaleOptions } from '../../shared/index.js'
 import { computed, toRef } from 'vue'
 import { useRouteLocale } from 'vuepress/client'
 
+/**
+ * Default locale configuration for search.
+ *
+ * 搜索的默认语言配置。
+ */
 const defaultLocales: SearchBoxLocales = {
   '/': {
     placeholder: 'Search',
@@ -21,6 +33,17 @@ const defaultLocales: SearchBoxLocales = {
   },
 }
 
+/**
+ * Get locale configuration for the current route.
+ *
+ * 获取当前路由的语言配置。
+ *
+ * @param locales - Locale configuration object / 语言配置对象
+ * @returns Computed ref to the current locale settings / 当前语言设置的计算引用
+ * @example
+ * const locale = useLocale(locales)
+ * console.log(locale.value.placeholder) // 'Search' or localized value
+ */
 export function useLocale(locales: MaybeRef<SearchBoxLocales>): ComputedRef<Partial<SearchLocaleOptions>> {
   const localesRef = toRef(locales)
   const routeLocale = useRouteLocale()
diff --git a/plugins/plugin-search/src/client/composables/searchIndex.ts b/plugins/plugin-search/src/client/composables/searchIndex.ts
index 0155e92e..e2595aea 100644
--- a/plugins/plugin-search/src/client/composables/searchIndex.ts
+++ b/plugins/plugin-search/src/client/composables/searchIndex.ts
@@ -1,13 +1,44 @@
+/**
+ * Search Index Composable for Search Plugin
+ *
+ * 搜索插件的搜索索引组合式函数
+ *
+ * @module plugin-search/client/composables/searchIndex
+ */
 import type { ShallowRef } from 'vue'
 import { searchIndex } from '@internal/minisearchIndex'
 import { shallowRef } from 'vue'
 
 declare const __VUE_HMR_RUNTIME__: Record<string, any>
 
+/**
+ * Type definition for search index data.
+ *
+ * 搜索索引数据的类型定义。
+ *
+ * Maps locale paths to functions that load the corresponding search index.
+ *
+ * 将语言路径映射到加载相应搜索索引的函数。
+ */
 type SearchIndexData = Record<string, () => Promise<{ default: string }>>
 
+/**
+ * Reactive reference to the search index data.
+ *
+ * 搜索索引数据的响应式引用。
+ */
 const searchIndexData = shallowRef<SearchIndexData>(searchIndex)
 
+/**
+ * Get the search index data for all locales.
+ *
+ * 获取所有语言的搜索索引数据。
+ *
+ * @returns Shallow ref to the search index data / 搜索索引数据的浅层引用
+ * @example
+ * const indexData = useSearchIndex()
+ * const localeIndex = await indexData.value['/zh/']()
+ */
 export function useSearchIndex(): ShallowRef<SearchIndexData> {
   return searchIndexData
 }
diff --git a/plugins/plugin-search/src/client/config.ts b/plugins/plugin-search/src/client/config.ts
index 7aa69306..2a279fad 100644
--- a/plugins/plugin-search/src/client/config.ts
+++ b/plugins/plugin-search/src/client/config.ts
@@ -1,3 +1,15 @@
+/**
+ * VuePress Client Configuration for Search Plugin
+ *
+ * 搜索插件的 VuePress 客户端配置
+ *
+ * Registers the SearchBox component globally and provides locale and option
+ * configuration to the search component.
+ *
+ * 全局注册 SearchBox 组件，并向搜索组件提供语言和选项配置。
+ *
+ * @module plugin-search/client/config
+ */
 import type { ClientConfig } from 'vuepress/client'
 import type { SearchBoxLocales, SearchOptions } from '../shared/index.js'
 import { h } from 'vue'
diff --git a/plugins/plugin-search/src/client/index.ts b/plugins/plugin-search/src/client/index.ts
index e56355ad..2a4f9704 100644
--- a/plugins/plugin-search/src/client/index.ts
+++ b/plugins/plugin-search/src/client/index.ts
@@ -1,3 +1,15 @@
+/**
+ * VuePress Search Plugin - Client Side Entry
+ *
+ * VuePress 搜索插件 - 客户端入口
+ *
+ * Exports the SearchBox component and search index composable for use in
+ * VuePress theme components.
+ *
+ * 导出 SearchBox 组件和搜索索引组合式函数，供 VuePress 主题组件使用。
+ *
+ * @module plugin-search/client
+ */
 import SearchBox from './components/Search.vue'
 import { useSearchIndex } from './composables/index.js'
 
diff --git a/plugins/plugin-search/src/client/utils/index.ts b/plugins/plugin-search/src/client/utils/index.ts
index 60cb7c08..3832b15b 100644
--- a/plugins/plugin-search/src/client/utils/index.ts
+++ b/plugins/plugin-search/src/client/utils/index.ts
@@ -1 +1,8 @@
+/**
+ * Utilities Entry Point
+ *
+ * 工具函数入口
+ *
+ * @module plugin-search/client/utils
+ */
 export * from './lru.js'
diff --git a/plugins/plugin-search/src/client/utils/lru.ts b/plugins/plugin-search/src/client/utils/lru.ts
index 191a6f0c..992d0a7a 100644
--- a/plugins/plugin-search/src/client/utils/lru.ts
+++ b/plugins/plugin-search/src/client/utils/lru.ts
@@ -1,14 +1,63 @@
-// adapted from https://stackoverflow.com/a/46432113/11613622
+/**
+ * LRU (Least Recently Used) Cache Implementation
+ *
+ * LRU（最近最少使用）缓存实现
+ *
+ * Adapted from https://stackoverflow.com/a/46432113/11613622
+ *
+ * @module plugin-search/client/utils/lru
+ */
 
+/**
+ * Generic LRU Cache implementation using Map.
+ *
+ * 使用 Map 实现的通用 LRU 缓存。
+ *
+ * Automatically evicts the least recently used item when the cache reaches
+ * its maximum size.
+ *
+ * 当缓存达到最大容量时，自动淘汰最近最少使用的项。
+ *
+ * @template K - Key type / 键类型
+ * @template V - Value type / 值类型
+ * @example
+ * const cache = new LRUCache<string, number>(3)
+ * cache.set('a', 1)
+ * cache.set('b', 2)
+ * cache.set('c', 3)
+ * cache.set('d', 4) // 'a' is evicted
+ * cache.get('b') // returns 2, 'b' becomes most recent
+ */
 export class LRUCache<K, V> {
+  /** Maximum number of items in the cache / 缓存中的最大项数 */
   private max: number
+  /** Internal Map storage / 内部 Map 存储 */
   private cache: Map<K, V>
 
+  /**
+   * Create a new LRU Cache instance.
+   *
+   * 创建新的 LRU 缓存实例。
+   *
+   * @param max - Maximum cache size (default: 10) / 最大缓存大小（默认：10）
+   */
   constructor(max: number = 10) {
     this.max = max
     this.cache = new Map<K, V>()
   }
 
+  /**
+   * Get a value from the cache.
+   *
+   * 从缓存中获取值。
+   *
+   * Accessing an item moves it to the end (most recently used position).
+   *
+   * 访问项会将其移动到末尾（最近使用的位置）。
+   *
+   * @param key - Cache key / 缓存键
+   * @returns Cached value or undefined if not found / 缓存值，未找到则返回 undefined
+   */
   get(key: K): V | undefined {
     const item = this.cache.get(key)
     if (item !== undefined) {
@@ -19,6 +68,19 @@ export class LRUCache<K, V> {
     return item
   }
 
+  /**
+   * Set a value in the cache.
+   *
+   * 在缓存中设置值。
+   *
+   * If the key already exists, it is moved to the end. If the cache is full,
+   * the oldest item is evicted.
+   *
+   * 如果键已存在，则将其移动到末尾。如果缓存已满，则淘汰最旧的项。
+   *
+   * @param key - Cache key / 缓存键
+   * @param val - Value to cache / 要缓存的值
+   */
   set(key: K, val: V): void {
     // refresh key
     if (this.cache.has(key))
@@ -29,10 +91,22 @@ export class LRUCache<K, V> {
     this.cache.set(key, val)
   }
 
+  /**
+   * Get the first (oldest) key in the cache.
+   *
+   * 获取缓存中的第一个（最旧的）键。
+   *
+   * @returns The oldest key or undefined if cache is empty / 最旧的键，缓存为空则返回 undefined
+   */
   first(): K | undefined {
     return this.cache.keys().next().value
   }
 
+  /**
+   * Clear all items from the cache.
+   *
+   * 清空缓存中的所有项。
+   */
   clear(): void {
     this.cache.clear()
   }
diff --git a/plugins/plugin-search/src/node/index.ts b/plugins/plugin-search/src/node/index.ts
index c9a3fdc3..5ef3469b 100644
--- a/plugins/plugin-search/src/node/index.ts
+++ b/plugins/plugin-search/src/node/index.ts
@@ -1,3 +1,14 @@
+/**
+ * VuePress Search Plugin - Node Side Entry
+ *
+ * VuePress 搜索插件 - Node 端入口
+ *
+ * Exports the search plugin and search index preparation utilities.
+ *
+ * 导出搜索插件和搜索索引准备工具。
+ *
+ * @module plugin-search/node
+ */
 export * from '../shared/index.js'
 export { prepareSearchIndex } from './prepareSearchIndex.js'
 export { searchPlugin } from './searchPlugin.js'
diff --git a/plugins/plugin-search/src/node/locales/de.ts b/plugins/plugin-search/src/node/locales/de.ts
index 26a5c718..4037834d 100644
--- a/plugins/plugin-search/src/node/locales/de.ts
+++ b/plugins/plugin-search/src/node/locales/de.ts
@@ -1,6 +1,17 @@
-/** 德语 */
+/**
+ * German locale configuration for search plugin.
+ *
+ * 搜索插件的德语本地化配置。
+ *
+ * @module plugin-search/node/locales/de
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * German search locale strings.
+ *
+ * 德语搜索本地化字符串。
+ */
 export const deSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: 'Dokumente durchsuchen',
   resetButtonTitle: 'Suche zurücksetzen',
diff --git a/plugins/plugin-search/src/node/locales/en.ts b/plugins/plugin-search/src/node/locales/en.ts
index 5db1c546..0c50da1e 100644
--- a/plugins/plugin-search/src/node/locales/en.ts
+++ b/plugins/plugin-search/src/node/locales/en.ts
@@ -1,5 +1,17 @@
+/**
+ * English locale configuration for search plugin.
+ *
+ * 搜索插件的英语本地化配置。
+ *
+ * @module plugin-search/node/locales/en
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * English search locale strings.
+ *
+ * 英语搜索本地化字符串。
+ */
 export const enSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: 'Search',
   resetButtonTitle: 'Reset search',
diff --git a/plugins/plugin-search/src/node/locales/fr.ts b/plugins/plugin-search/src/node/locales/fr.ts
index 2a935743..0475a997 100644
--- a/plugins/plugin-search/src/node/locales/fr.ts
+++ b/plugins/plugin-search/src/node/locales/fr.ts
@@ -1,6 +1,17 @@
-/** 法语 */
+/**
+ * French locale configuration for search plugin.
+ *
+ * 搜索插件的法语本地化配置。
+ *
+ * @module plugin-search/node/locales/fr
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * French search locale strings.
+ *
+ * 法语搜索本地化字符串。
+ */
 export const frSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: 'Rechercher dans la documentation',
   resetButtonTitle: 'Réinitialiser la recherche',
diff --git a/plugins/plugin-search/src/node/locales/index.ts b/plugins/plugin-search/src/node/locales/index.ts
index e7f2353d..d030937b 100644
--- a/plugins/plugin-search/src/node/locales/index.ts
+++ b/plugins/plugin-search/src/node/locales/index.ts
@@ -1,7 +1,14 @@
 /**
- * 多语言预设
- * 除 /zh/ 、 /en/ 外，其它语言预设通过 AI 生成，不保证准确
- * 如有错误，欢迎提 issue
+ * Multi-language presets for search plugin.
+ *
+ * 搜索插件的多语言预设。
+ *
+ * Language presets other than /zh/ and /en/ are generated by AI and may not be accurate.
+ * If you find any errors, please submit an issue.
+ *
+ * 除 /zh/ 和 /en/ 外，其他语言预设通过 AI 生成，不保证准确。如有错误，欢迎提 issue。
+ *
+ * @module plugin-search/node/locales
  */
 import type { DefaultLocaleInfo } from '@vuepress/helper'
 import type { SearchLocaleOptions } from '../../shared/index.js'
@@ -13,6 +20,15 @@ import { ruSearchLocale } from './ru.js'
 import { zhTwSearchLocale } from './zh-tw.js'
 import { zhSearchLocale } from './zh.js'
 
+/**
+ * Default locale configurations for search plugin.
+ *
+ * 搜索插件的默认语言配置。
+ *
+ * Maps language codes to their respective locale strings.
+ *
+ * 将语言代码映射到相应的本地化字符串。
+ */
 export const SEARCH_LOCALES: DefaultLocaleInfo<Partial<SearchLocaleOptions>> = [
   [['en', 'en-US'], enSearchLocale],
   [['zh', 'zh-CN', 'zh-Hans', 'zh-Hant'], zhSearchLocale],
diff --git a/plugins/plugin-search/src/node/locales/ja.ts b/plugins/plugin-search/src/node/locales/ja.ts
index 946c0f2a..de96529b 100644
--- a/plugins/plugin-search/src/node/locales/ja.ts
+++ b/plugins/plugin-search/src/node/locales/ja.ts
@@ -1,6 +1,17 @@
-/** 日语 */
+/**
+ * Japanese locale configuration for search plugin.
+ *
+ * 搜索插件的日语本地化配置。
+ *
+ * @module plugin-search/node/locales/ja
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * Japanese search locale strings.
+ *
+ * 日语搜索本地化字符串。
+ */
 export const jaSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: 'ドキュメントを検索',
   resetButtonTitle: '検索をリセット',
diff --git a/plugins/plugin-search/src/node/locales/ru.ts b/plugins/plugin-search/src/node/locales/ru.ts
index 5c06700c..5cf1ce29 100644
--- a/plugins/plugin-search/src/node/locales/ru.ts
+++ b/plugins/plugin-search/src/node/locales/ru.ts
@@ -1,6 +1,17 @@
-/** 俄语 */
+/**
+ * Russian locale configuration for search plugin.
+ *
+ * 搜索插件的俄语本地化配置。
+ *
+ * @module plugin-search/node/locales/ru
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * Russian search locale strings.
+ *
+ * 俄语搜索本地化字符串。
+ */
 export const ruSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: 'Поиск по документации',
   resetButtonTitle: 'Сбросить поиск',
diff --git a/plugins/plugin-search/src/node/locales/zh-tw.ts b/plugins/plugin-search/src/node/locales/zh-tw.ts
index 4973f911..448f6a5e 100644
--- a/plugins/plugin-search/src/node/locales/zh-tw.ts
+++ b/plugins/plugin-search/src/node/locales/zh-tw.ts
@@ -1,6 +1,17 @@
-/** 繁体中文 */
+/**
+ * Traditional Chinese (Taiwan) locale configuration for search plugin.
+ *
+ * 搜索插件的繁体中文（台湾）本地化配置。
+ *
+ * @module plugin-search/node/locales/zh-tw
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * Traditional Chinese (Taiwan) search locale strings.
+ *
+ * 繁体中文（台湾）搜索本地化字符串。
+ */
 export const zhTwSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: '搜尋文件',
   resetButtonTitle: '重設搜尋',
diff --git a/plugins/plugin-search/src/node/locales/zh.ts b/plugins/plugin-search/src/node/locales/zh.ts
index 4e3fb81c..a6a0f9e1 100644
--- a/plugins/plugin-search/src/node/locales/zh.ts
+++ b/plugins/plugin-search/src/node/locales/zh.ts
@@ -1,5 +1,17 @@
+/**
+ * Simplified Chinese locale configuration for search plugin.
+ *
+ * 搜索插件的简体中文本地化配置。
+ *
+ * @module plugin-search/node/locales/zh
+ */
 import type { SearchLocaleOptions } from '../../shared/index.js'
 
+/**
+ * Simplified Chinese search locale strings.
+ *
+ * 简体中文搜索本地化字符串。
+ */
 export const zhSearchLocale: Partial<SearchLocaleOptions> = {
   placeholder: '搜索文档',
   resetButtonTitle: '重置搜索',
diff --git a/plugins/plugin-search/src/node/prepareSearchIndex.ts b/plugins/plugin-search/src/node/prepareSearchIndex.ts
index 0760cbe1..a3ef91ac 100644
--- a/plugins/plugin-search/src/node/prepareSearchIndex.ts
+++ b/plugins/plugin-search/src/node/prepareSearchIndex.ts
@@ -1,26 +1,71 @@
+/**
+ * Search Index Preparation Module
+ *
+ * 搜索索引准备模块
+ *
+ * This module handles the creation, update, and management of MiniSearch indexes
+ * for VuePress pages, supporting multiple locales and hot module replacement.
+ *
+ * 本模块处理 VuePress 页面的 MiniSearch 索引的创建、更新和管理，
+ * 支持多语言和热模块替换。
+ *
+ * @module plugin-search/node/prepareSearchIndex
+ */
 import type { App, Page } from 'vuepress/core'
 import type { SearchOptions, SearchPluginOptions } from '../shared/index.js'
 import MiniSearch from 'minisearch'
 import pMap from 'p-map'
 import { colors, logger } from 'vuepress/utils'
 
+/**
+ * Options for search index preparation.
+ *
+ * 搜索索引准备的配置选项。
+ */
 export interface SearchIndexOptions {
+  /** VuePress application instance / VuePress 应用实例 */
   app: App
+  /** MiniSearch configuration options / MiniSearch 配置选项 */
   searchOptions: SearchOptions
+  /** Function to filter searchable pages / 过滤可搜索页面的函数 */
   isSearchable: SearchPluginOptions['isSearchable']
 }
 
+/**
+ * Internal index object structure for MiniSearch.
+ *
+ * MiniSearch 的内部索引对象结构。
+ */
 interface IndexObject {
+  /** Unique identifier for the indexed item / 索引项的唯一标识符 */
   id: string
+  /** Text content for searching / 用于搜索的文本内容 */
   text: string
+  /** Title of the section / 章节标题 */
   title: string
+  /** Parent titles hierarchy / 父级标题层级 */
   titles: string[]
 }
 
+/** Directory path for storing search index files / 存储搜索索引文件的目录路径 */
 const SEARCH_INDEX_DIR = 'internal/minisearchIndex/'
+
+/** Map of locale paths to their MiniSearch instances / 语言路径到 MiniSearch 实例的映射 */
 const indexByLocales = new Map<string, MiniSearch<IndexObject>>()
+
+/** Cache for index objects by file path / 按文件路径缓存索引对象 */
 const indexCache = new Map<string, IndexObject[]>()
 
+/**
+ * Get or create a MiniSearch index for a specific locale.
+ *
+ * 获取或创建特定语言的 MiniSearch 索引。
+ *
+ * @param locale - Locale path (e.g., '/', '/zh/') / 语言路径
+ * @param lang - Language code for tokenization / 用于分词的语言代码
+ * @param options - Search index options / 搜索索引选项
+ * @returns MiniSearch instance for the locale / 该语言的 MiniSearch 实例
+ */
 function getIndexByLocale(locale: string, lang: string, options: SearchIndexOptions['searchOptions']) {
   let index = indexByLocales.get(locale)
   if (!index) {
@@ -38,6 +83,14 @@ function getIndexByLocale(locale: string, lang: string, options: SearchIndexOpti
   return index
 }
 
+/**
+ * Get or create an index cache for a specific file path.
+ *
+ * 获取或创建特定文件路径的索引缓存。
+ *
+ * @param filepath - File path to get cache for / 要获取缓存的文件路径
+ * @returns Array of index objects for the file / 该文件的索引对象数组
+ */
 function getIndexCache(filepath: string) {
   let index = indexCache.get(filepath)
   if (!index) {
@@ -47,10 +100,39 @@ function getIndexCache(filepath: string) {
   return index
 }
 
+/**
+ * Write a placeholder search index file for development mode.
+ *
+ * 为开发模式写入占位符搜索索引文件。
+ *
+ * This is used to provide an empty index before the actual index is prepared,
+ * preventing errors when the search component loads before indexing completes.
+ *
+ * 用于在实际索引准备完成之前提供空索引，
+ * 防止搜索组件在索引完成之前加载时出错。
+ *
+ * @param app - VuePress application instance / VuePress 应用实例
+ */
 export async function prepareSearchIndexPlaceholder(app: App) {
   await app.writeTemp(`${SEARCH_INDEX_DIR}index.js`, 'export const searchIndex = {}')
 }
 
+/**
+ * Prepare search indexes for all pages in the VuePress application.
+ *
+ * 为 VuePress 应用中的所有页面准备搜索索引。
+ *
+ * This function indexes all pages concurrently, creating separate MiniSearch
+ * instances for each locale, and writes the indexes to temporary files.
+ *
+ * 此函数并发索引所有页面，为每个语言创建独立的 MiniSearch 实例，
+ * 并将索引写入临时文件。
+ *
+ * @param options - Search index preparation options / 搜索索引准备选项
+ * @param options.app - VuePress application instance / VuePress 应用实例
+ * @param options.isSearchable - Function to filter searchable pages / 过滤可搜索页面的函数
+ * @param options.searchOptions - MiniSearch configuration / MiniSearch 配置
+ */
 export async function prepareSearchIndex({
   app,
   isSearchable,
@@ -78,6 +160,17 @@ export async function prepareSearchIndex({
   }
 }
 
+/**
+ * Handle search index update when a page is modified.
+ *
+ * 当页面被修改时处理搜索索引更新。
+ *
+ * @param filepath - Path of the modified file relative to project root / 相对于项目根目录的修改文件路径
+ * @param options - Search index preparation options / 搜索索引准备选项
+ * @param options.app - VuePress application instance / VuePress 应用实例
+ * @param options.isSearchable - Function to filter searchable pages / 过滤可搜索页面的函数
+ * @param options.searchOptions - MiniSearch configuration / MiniSearch 配置
+ */
 export async function onSearchIndexUpdated(
   filepath: string,
   {
@@ -97,6 +190,17 @@ export async function onSearchIndexUpdated(
   }
 }
 
+/**
+ * Handle search index update when a page is removed.
+ *
+ * 当页面被删除时处理搜索索引更新。
+ *
+ * @param filepath - Path of the removed file relative to project root / 相对于项目根目录的删除文件路径
+ * @param options - Search index preparation options / 搜索索引准备选项
+ * @param options.app - VuePress application instance / VuePress 应用实例
+ * @param options.isSearchable - Function to filter searchable pages / 过滤可搜索页面的函数
+ * @param options.searchOptions - MiniSearch configuration / MiniSearch 配置
+ */
 export async function onSearchIndexRemoved(
   filepath: string,
   {
@@ -119,6 +223,19 @@ export async function onSearchIndexRemoved(
   }
 }
 
+/**
+ * Write all search indexes to temporary files.
+ *
+ * 将所有搜索索引写入临时文件。
+ *
+ * Creates separate JavaScript files for each locale's search index,
+ * enabling lazy loading of indexes in the client.
+ *
+ * 为每个语言的搜索索引创建独立的 JavaScript 文件，
+ * 支持客户端延迟加载索引。
+ *
+ * @param app - VuePress application instance / VuePress 应用实例
+ */
 async function writeTemp(app: App) {
   const records: string[] = []
   const promises: Promise<string>[] = []
@@ -145,6 +262,21 @@ async function writeTemp(app: App) {
   await Promise.all(promises)
 }
 
+/**
+ * Index a single page for search.
+ *
+ * 为单个页面建立搜索索引。
+ *
+ * Extracts content from the page, splits it into sections based on headings,
+ * and adds each section to the appropriate locale's MiniSearch index.
+ *
+ * 从页面提取内容，根据标题将其分割为章节，
+ * 并将每个章节添加到相应语言的 MiniSearch 索引中。
+ *
+ * @param page - VuePress page object / VuePress 页面对象
+ * @param options - MiniSearch options / MiniSearch 选项
+ * @param isSearchable - Function to check if page should be indexed / 检查页面是否应被索引的函数
+ */
 async function indexFile(page: Page, options: SearchIndexOptions['searchOptions'], isSearchable: SearchPluginOptions['isSearchable']) {
   if (!page.filePath || page.frontmatter?.search === false)
     return
@@ -194,13 +326,27 @@ ${page.contentRendered}`
   }
 }
 
+/** Regex pattern for matching heading tags / 匹配标题标签的正则表达式 */
 // eslint-disable-next-line regexp/no-super-linear-backtracking
 const headingRegex = /<h(\d*).*?>(<a.*? href="#.*?".*?>[\s\S]*?<\/a>)<\/h\1>/gi
+/** Regex pattern for extracting heading content / 提取标题内容的正则表达式 */
 // eslint-disable-next-line regexp/no-super-linear-backtracking
 const headingContentRegex = /<a.*? href="#(.*?)".*?><span>([\s\S]*?)<\/span><\/a>/i
+/** Regex pattern for ignoring template content / 忽略模板内容的正则表达式 */
 const ignoreHeadingRegex = /<template[^>]*>[\s\S]*<\/template>/gi
+
 /**
- * Splits HTML into sections based on headings
+ * Split HTML content into sections based on heading elements.
+ *
+ * 根据标题元素将 HTML 内容分割为章节。
+ *
+ * This generator function parses HTML content and yields section objects
+ * containing anchor, titles hierarchy, and searchable text.
+ *
+ * 此生成器函数解析 HTML 内容并生成包含锚点、标题层级和可搜索文本的章节对象。
+ *
+ * @param html - HTML content to split / 要分割的 HTML 内容
+ * @yields Section objects with anchor, titles, and text / 包含锚点、标题和文本的章节对象
  */
 function* splitPageIntoSections(html: string) {
   const result = html.split(headingRegex)
@@ -228,17 +374,41 @@ function* splitPageIntoSections(html: string) {
   }
 }
 
+/**
+ * Extract searchable text from HTML content by removing tags.
+ *
+ * 通过移除标签从 HTML 内容中提取可搜索文本。
+ *
+ * @param content - HTML content / HTML 内容
+ * @returns Plain text content / 纯文本内容
+ */
 function getSearchableText(content: string) {
   content = clearHtmlTags(content)
   return content
 }
 
+/**
+ * Remove all HTML tags from a string.
+ *
+ * 移除字符串中的所有 HTML 标签。
+ *
+ * @param str - String containing HTML / 包含 HTML 的字符串
+ * @returns String with HTML tags removed / 移除 HTML 标签后的字符串
+ */
 function clearHtmlTags(str: string) {
   str = str.replace(ignoreHeadingRegex, '')
   // 移除其他所有HTML标签
   return str.replace(/<[^>]*>/g, '')
 }
 
+/**
+ * Generate HMR (Hot Module Replacement) code for the search index.
+ *
+ * 为搜索索引生成 HMR（热模块替换）代码。
+ *
+ * @param m - Module name / 模块名称
+ * @returns HMR code string / HMR 代码字符串
+ */
 function genHmrCode(m: string) {
   const func = `update${m[0].toUpperCase()}${m.slice(1)}`
   return `
diff --git a/plugins/plugin-search/src/node/searchPlugin.ts b/plugins/plugin-search/src/node/searchPlugin.ts
index d37b258f..24684796 100644
--- a/plugins/plugin-search/src/node/searchPlugin.ts
+++ b/plugins/plugin-search/src/node/searchPlugin.ts
@@ -8,6 +8,36 @@ import { onSearchIndexRemoved, onSearchIndexUpdated, prepareSearchIndex, prepare
 
 const __dirname = getDirname(import.meta.url)
 
+/**
+ * Create a VuePress search plugin instance.
+ *
+ * 创建 VuePress 搜索插件实例。
+ *
+ * @param options - Plugin configuration options / 插件配置选项
+ * @param options.locales - Locale-specific search configurations / 特定语言的搜索配置
+ * @param options.isSearchable - Function to determine if a page should be indexed / 判断页面是否应被索引的函数
+ * @param options.searchOptions - MiniSearch options / MiniSearch 配置选项
+ * @returns VuePress plugin object / VuePress 插件对象
+ * @example
+ * // Basic usage
+ * export default {
+ *   plugins: [
+ *     searchPlugin()
+ *   ]
+ * }
+ *
+ * // With custom options
+ * export default {
+ *   plugins: [
+ *     searchPlugin({
+ *       locales: {
+ *         '/zh/': { placeholder: '搜索文档' }
+ *       },
+ *       isSearchable: (page) => page.path !== '/secret/'
+ *     })
+ *   ]
+ * }
+ */
 export function searchPlugin({
   locales = {},
   isSearchable,
diff --git a/plugins/plugin-search/src/shared/index.ts b/plugins/plugin-search/src/shared/index.ts
index a772af98..21faccca 100644
--- a/plugins/plugin-search/src/shared/index.ts
+++ b/plugins/plugin-search/src/shared/index.ts
@@ -1,40 +1,107 @@
+/**
+ * Shared Types for VuePress Search Plugin
+ *
+ * VuePress 搜索插件的共享类型
+ *
+ * This module contains type definitions shared between the node and client
+ * sides of the search plugin.
+ *
+ * 本模块包含搜索插件在 Node 端和客户端之间共享的类型定义。
+ *
+ * @module plugin-search/shared
+ */
 import type { Options as MiniSearchOptions } from 'minisearch'
 import type { LocaleConfig, Page } from 'vuepress/core'
 
+/**
+ * Locale options for search UI strings.
+ *
+ * 搜索 UI 字符串的语言选项。
+ */
 export interface SearchLocaleOptions {
+  /** Placeholder text for search input / 搜索输入框的占位文本 */
   placeholder: string
+  /** Text for search button / 搜索按钮的文本 */
   buttonText: string
+  /** Title for reset button / 重置按钮的标题 */
   resetButtonTitle: string
+  /** Title for back/close button / 返回/关闭按钮的标题 */
   backButtonTitle: string
+  /** Text shown when no results found / 无搜索结果时显示的文本 */
   noResultsText: string
+  /** Footer keyboard shortcut hints / 底部键盘快捷键提示 */
   footer: {
+    /** Text for select action / 选择操作的文本 */
     selectText: string
+    /** ARIA label for select key / 选择键的 ARIA 标签 */
     selectKeyAriaLabel: string
+    /** Text for navigate action / 导航操作的文本 */
     navigateText: string
+    /** ARIA label for navigate up key / 向上导航键的 ARIA 标签 */
     navigateUpKeyAriaLabel: string
+    /** ARIA label for navigate down key / 向下导航键的 ARIA 标签 */
     navigateDownKeyAriaLabel: string
+    /** Text for close action / 关闭操作的文本 */
     closeText: string
+    /** ARIA label for close key / 关闭键的 ARIA 标签 */
     closeKeyAriaLabel: string
   }
 }
 
+/**
+ * Locale configuration type for search box.
+ *
+ * 搜索框的语言配置类型。
+ */
 export type SearchBoxLocales = LocaleConfig<SearchLocaleOptions>
 
+/**
+ * Options for the search plugin.
+ *
+ * 搜索插件的选项。
+ */
 export interface SearchPluginOptions extends SearchOptions {
+  /** Locale-specific search configurations / 特定语言的搜索配置 */
   locales?: SearchBoxLocales
 
+  /**
+   * Function to determine if a page should be indexed.
+   *
+   * 判断页面是否应被索引的函数。
+   *
+   * @param page - VuePress page object / VuePress 页面对象
+   * @returns Whether the page should be searchable / 页面是否可搜索
+   */
   isSearchable?: (page: Page) => boolean
 
 }
 
+/**
+ * Search configuration options.
+ *
+ * 搜索配置选项。
+ */
 export interface SearchOptions {
   /**
+   * Whether to disable query persistence in session storage.
+   *
+   * 是否禁用会话存储中的查询持久化。
+   *
    * @default false
    */
   disableQueryPersistence?: boolean
 
+  /**
+   * MiniSearch configuration options.
+   *
+   * MiniSearch 配置选项。
+   */
   miniSearch?: {
     /**
+     * MiniSearch instance options.
+     *
+     * MiniSearch 实例选项。
+     *
      * @see https://lucaong.github.io/minisearch/modules/_minisearch_.html#options
      */
     options?: Pick<
@@ -42,6 +109,10 @@ export interface SearchOptions {
       'extractField' | 'tokenize' | 'processTerm'
     >
     /**
+     * MiniSearch search options.
+     *
+     * MiniSearch 搜索选项。
+     *
      * @see https://lucaong.github.io/minisearch/modules/_minisearch_.html#searchoptions-1
      */
     searchOptions?: MiniSearchOptions['searchOptions']