diff --git a/D1初始化.md b/D1初始化.md
new file mode 100644
index 0000000..f6dc790
--- /dev/null
+++ b/D1初始化.md
@@ -0,0 +1,75 @@
+```sql
+CREATE TABLE IF NOT EXISTS users (
+    username TEXT PRIMARY KEY,
+    password TEXT NOT NULL,
+    created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+  );
+
+  CREATE TABLE IF NOT EXISTS play_records (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL,
+    key TEXT NOT NULL,
+    title TEXT NOT NULL,
+    source_name TEXT NOT NULL,
+    cover TEXT NOT NULL,
+    year TEXT NOT NULL,
+    index_episode INTEGER NOT NULL,
+    total_episodes INTEGER NOT NULL,
+    play_time INTEGER NOT NULL,
+    total_time INTEGER NOT NULL,
+    save_time INTEGER NOT NULL,
+    search_title TEXT,
+    UNIQUE(username, key)
+  );
+
+  CREATE TABLE IF NOT EXISTS favorites (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL,
+    key TEXT NOT NULL,
+    title TEXT NOT NULL,
+    source_name TEXT NOT NULL,
+    cover TEXT NOT NULL,
+    year TEXT NOT NULL,
+    total_episodes INTEGER NOT NULL,
+    save_time INTEGER NOT NULL,
+    UNIQUE(username, key)
+  );
+
+  CREATE TABLE IF NOT EXISTS search_history (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL,
+    keyword TEXT NOT NULL,
+    created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+    UNIQUE(username, keyword)
+  );
+
+  CREATE TABLE IF NOT EXISTS admin_config (
+    id INTEGER PRIMARY KEY DEFAULT 1,
+    config TEXT NOT NULL,
+    updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+  );
+
+  -- 基本索引
+  CREATE INDEX IF NOT EXISTS idx_play_records_username ON play_records(username);
+  CREATE INDEX IF NOT EXISTS idx_favorites_username ON favorites(username);
+  CREATE INDEX IF NOT EXISTS idx_search_history_username ON search_history(username);
+
+  -- 复合索引优化查询性能
+  -- 播放记录：用户名+键值的复合索引，用于快速查找特定记录
+  CREATE INDEX IF NOT EXISTS idx_play_records_username_key ON play_records(username, key);
+  -- 播放记录：用户名+保存时间的复合索引，用于按时间排序的查询
+  CREATE INDEX IF NOT EXISTS idx_play_records_username_save_time ON play_records(username, save_time DESC);
+
+  -- 收藏：用户名+键值的复合索引，用于快速查找特定收藏
+  CREATE INDEX IF NOT EXISTS idx_favorites_username_key ON favorites(username, key);
+  -- 收藏：用户名+保存时间的复合索引，用于按时间排序的查询
+  CREATE INDEX IF NOT EXISTS idx_favorites_username_save_time ON favorites(username, save_time DESC);
+
+  -- 搜索历史：用户名+关键词的复合索引，用于快速查找/删除特定搜索记录
+  CREATE INDEX IF NOT EXISTS idx_search_history_username_keyword ON search_history(username, keyword);
+  -- 搜索历史：用户名+创建时间的复合索引，用于按时间排序的查询
+  CREATE INDEX IF NOT EXISTS idx_search_history_username_created_at ON search_history(username, created_at DESC);
+
+  -- 搜索历史清理查询的优化索引
+  CREATE INDEX IF NOT EXISTS idx_search_history_username_id_created_at ON search_history(username, id, created_at DESC);
+```
diff --git a/src/lib/d1.db.ts b/src/lib/d1.db.ts
index 40faf78..87f487a 100644
--- a/src/lib/d1.db.ts
+++ b/src/lib/d1.db.ts
@@ -44,117 +44,14 @@ function getD1Database(): D1Database {
 
 export class D1Storage implements IStorage {
   private db: D1Database | null = null;
-  private initialized = false;
 
   private async getDatabase(): Promise<D1Database> {
     if (!this.db) {
       this.db = getD1Database();
-      if (!this.initialized) {
-        await this.initDatabase();
-        this.initialized = true;
-      }
     }
     return this.db;
   }
 
-  private async initDatabase() {
-    try {
-      if (!this.db) {
-        throw new Error('D1 database instance not available');
-      }
-
-      console.log('Executing D1 database initialization SQL...');
-
-      // 将初始化SQL分解为单独的语句
-      const statements = [
-        `CREATE TABLE IF NOT EXISTS users (
-          username TEXT PRIMARY KEY,
-          password TEXT NOT NULL,
-          created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
-        )`,
-
-        `CREATE TABLE IF NOT EXISTS play_records (
-          id INTEGER PRIMARY KEY AUTOINCREMENT,
-          username TEXT NOT NULL,
-          key TEXT NOT NULL,
-          title TEXT NOT NULL,
-          source_name TEXT NOT NULL,
-          cover TEXT NOT NULL,
-          year TEXT NOT NULL,
-          index_episode INTEGER NOT NULL,
-          total_episodes INTEGER NOT NULL,
-          play_time INTEGER NOT NULL,
-          total_time INTEGER NOT NULL,
-          save_time INTEGER NOT NULL,
-          search_title TEXT,
-          UNIQUE(username, key)
-        )`,
-
-        `CREATE TABLE IF NOT EXISTS favorites (
-          id INTEGER PRIMARY KEY AUTOINCREMENT,
-          username TEXT NOT NULL,
-          key TEXT NOT NULL,
-          title TEXT NOT NULL,
-          source_name TEXT NOT NULL,
-          cover TEXT NOT NULL,
-          year TEXT NOT NULL,
-          total_episodes INTEGER NOT NULL,
-          save_time INTEGER NOT NULL,
-          UNIQUE(username, key)
-        )`,
-
-        `CREATE TABLE IF NOT EXISTS search_history (
-          id INTEGER PRIMARY KEY AUTOINCREMENT,
-          username TEXT NOT NULL,
-          keyword TEXT NOT NULL,
-          created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
-          UNIQUE(username, keyword)
-        )`,
-
-        `CREATE TABLE IF NOT EXISTS admin_config (
-          id INTEGER PRIMARY KEY DEFAULT 1,
-          config TEXT NOT NULL,
-          updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
-        )`,
-
-        // 基本索引
-        `CREATE INDEX IF NOT EXISTS idx_play_records_username ON play_records(username)`,
-        `CREATE INDEX IF NOT EXISTS idx_favorites_username ON favorites(username)`,
-        `CREATE INDEX IF NOT EXISTS idx_search_history_username ON search_history(username)`,
-
-        // 复合索引
-        `CREATE INDEX IF NOT EXISTS idx_play_records_username_key ON play_records(username, key)`,
-        `CREATE INDEX IF NOT EXISTS idx_play_records_username_save_time ON play_records(username, save_time DESC)`,
-        `CREATE INDEX IF NOT EXISTS idx_favorites_username_key ON favorites(username, key)`,
-        `CREATE INDEX IF NOT EXISTS idx_favorites_username_save_time ON favorites(username, save_time DESC)`,
-        `CREATE INDEX IF NOT EXISTS idx_search_history_username_keyword ON search_history(username, keyword)`,
-        `CREATE INDEX IF NOT EXISTS idx_search_history_username_created_at ON search_history(username, created_at DESC)`,
-        `CREATE INDEX IF NOT EXISTS idx_search_history_username_id_created_at ON search_history(username, id, created_at DESC)`,
-      ];
-
-      // 逐个执行每个SQL语句
-      for (let i = 0; i < statements.length; i++) {
-        const statement = statements[i];
-        try {
-          console.log(
-            `Executing SQL statement ${i + 1}/${statements.length}:`,
-            statement.substring(0, 50) + '...'
-          );
-          await this.db.prepare(statement).run();
-        } catch (err) {
-          console.error(`Failed to execute statement ${i + 1}:`, statement);
-          console.error('Error:', err);
-          throw err;
-        }
-      }
-
-      console.log('D1 database initialization completed successfully');
-    } catch (err) {
-      console.error('Failed to initialize D1 database:', err);
-      throw err;
-    }
-  }
-
   // 播放记录相关
   async getPlayRecord(
     userName: string,