diff --git a/apps/desktop/src-tauri/src/app_state.rs b/apps/desktop/src-tauri/src/app_state.rs
index 8d5ce40..4b6f45b 100644
--- a/apps/desktop/src-tauri/src/app_state.rs
+++ b/apps/desktop/src-tauri/src/app_state.rs
@@ -67,14 +67,13 @@ impl AppState {
             let _ = self.initialize_database();
         }
 
-        let db_guard = self.database.lock().unwrap();
-        if let Some(ref _database) = *db_guard {
-            // 创建一个新的数据库连接，使用相同的路径
+        // 使用静态数据库实例，避免重复初始化
+        use std::sync::OnceLock;
+        static DATABASE_INSTANCE: OnceLock<Arc<Database>> = OnceLock::new();
+
+        DATABASE_INSTANCE.get_or_init(|| {
             Arc::new(Database::new().unwrap())
-        } else {
-            // 如果仍然失败，创建一个新的
-            Arc::new(Database::new().unwrap())
-        }
+        }).clone()
     }
 
     /// 用于测试的构造函数
diff --git a/apps/desktop/src-tauri/src/presentation/commands/video_classification_commands.rs b/apps/desktop/src-tauri/src/presentation/commands/video_classification_commands.rs
index d19b155..33084b3 100644
--- a/apps/desktop/src-tauri/src/presentation/commands/video_classification_commands.rs
+++ b/apps/desktop/src-tauri/src/presentation/commands/video_classification_commands.rs
@@ -19,10 +19,10 @@ static QUEUE_INSTANCE: tokio::sync::OnceCell<Arc<VideoClassificationQueue>> = to
 async fn get_queue_instance(state: &AppState) -> Arc<VideoClassificationQueue> {
     QUEUE_INSTANCE.get_or_init(|| async {
         let database = state.get_database();
-        
+
         let video_repo = Arc::new(VideoClassificationRepository::new(database.clone()));
         let ai_classification_repo = Arc::new(AiClassificationRepository::new(database.clone()));
-        let material_repo = Arc::new(MaterialRepository::new(state.get_database().get_connection()).unwrap());
+        let material_repo = Arc::new(MaterialRepository::new(database.get_connection()).unwrap());
         
         let gemini_config = Some(GeminiConfig::default());
         let service = Arc::new(VideoClassificationService::new(