diff --git a/src/database.rs b/src/database.rs
index 2d1e248..b797f2c 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -1,7 +1,9 @@
-use sqlx::{SqlitePool, sqlite::SqlitePoolOptions, Row};
+use sqlx::{SqlitePool, sqlite::SqlitePoolOptions, Row, Error as SqlxError};
 use crate::config::Config;
 use crate::models::*;
 use uuid::Uuid;
+use std::time::Duration;
+use tokio::time::sleep;
 
 pub struct Database {
     pool: SqlitePool,
@@ -31,10 +33,24 @@ impl Database {
         }
         
         let pool = SqlitePoolOptions::new()
-            .max_connections(5)
+            .max_connections(10) // 增加连接数
+            .min_connections(2) // 保持最小连接数
+            .acquire_timeout(std::time::Duration::from_secs(30)) // 增加获取连接超时时间
+            .idle_timeout(std::time::Duration::from_secs(300)) // 增加空闲超时时间
+            .max_lifetime(std::time::Duration::from_secs(1800)) // 增加最大生命周期
             .connect(url)
             .await?;
         
+        // 在迁移之前设置SQLite性能优化参数
+        // 这些PRAGMA语句必须在事务外执行
+        sqlx::query("PRAGMA journal_mode=WAL;").execute(&pool).await?;
+        sqlx::query("PRAGMA wal_autocheckpoint=4000;").execute(&pool).await?;
+        sqlx::query("PRAGMA synchronous=NORMAL;").execute(&pool).await?;
+        sqlx::query("PRAGMA cache_size=-64000;").execute(&pool).await?;
+        sqlx::query("PRAGMA mmap_size=268435456;").execute(&pool).await?;
+        sqlx::query("PRAGMA temp_store=MEMORY;").execute(&pool).await?;
+        sqlx::query("PRAGMA foreign_keys=ON;").execute(&pool).await?;
+        
         // 创建表
         sqlx::migrate!("./migrations").run(&pool).await?;
         
@@ -42,6 +58,53 @@ impl Database {
     }
 
     
+    /// 带重试机制的数据库操作执行器
+    async fn execute_with_retry<F, T>(&self, operation: F, operation_name: &str) -> Result<T, sqlx::Error>
+    where
+        F: Fn() -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<T, sqlx::Error>> + Send>>,
+    {
+        const MAX_RETRIES: u32 = 3;
+        const BASE_DELAY_MS: u64 = 100;
+        
+        for attempt in 0..=MAX_RETRIES {
+            match operation().await {
+                Ok(result) => return Ok(result),
+                Err(e) => {
+                    // 检查是否是死锁或超时错误
+                    if self.is_retryable_error(&e) && attempt < MAX_RETRIES {
+                        let delay_ms = BASE_DELAY_MS * 2u64.pow(attempt);
+                        eprintln!("⚠️  {} 操作失败 (尝试 {}): {}, 等待 {}ms 后重试", 
+                            operation_name, attempt + 1, e, delay_ms);
+                        sleep(Duration::from_millis(delay_ms)).await;
+                    } else {
+                        eprintln!("❌ {} 操作失败 (尝试 {}): {}", operation_name, attempt + 1, e);
+                        return Err(e);
+                    }
+                }
+            }
+        }
+        
+        unreachable!()
+    }
+
+    /// 判断错误是否可重试
+    fn is_retryable_error(&self, error: &SqlxError) -> bool {
+        match error {
+            SqlxError::Database(db_err) => {
+                // SQLite 死锁错误码
+                if let Some(code) = db_err.code() {
+                    code == "5" || // SQLITE_BUSY
+                    code == "6" || // SQLITE_LOCKED  
+                    code == "261"  // SQLITE_BUSY_SNAPSHOT
+                } else {
+                    false
+                }
+            }
+            SqlxError::PoolTimedOut => true,
+            _ => false,
+        }
+    }
+
     // 相册操作
     pub async fn get_all_albums(&self) -> Result<Vec<AlbumInfo>, sqlx::Error> {
         let albums = sqlx::query(
@@ -299,6 +362,7 @@ impl Database {
             return Ok(Vec::new());
         }
 
+        // 由于生命周期问题，简化实现，不使用重试机制
         let now = chrono::Utc::now().to_rfc3339();
         let mut ids = Vec::new();
         
diff --git a/src/import.rs b/src/import.rs
index f155f9d..f112b15 100644
--- a/src/import.rs
+++ b/src/import.rs
@@ -57,52 +57,32 @@ pub async fn import_existing_data(config: &Config, db: Arc<Database>) -> Result<
         return Ok(());
     }
     
-    // 第二阶段：并行处理相册导入
-    let mut tasks = Vec::new();
-    
-    // 限制并发数量，避免内存爆炸
-    let max_concurrent = std::thread::available_parallelism()?.get().min(4);
-    let semaphore = Arc::new(tokio::sync::Semaphore::new(max_concurrent));
-    
-    for (folder_name, path) in album_folders {
-        let db_clone = Arc::clone(&db);
-        let semaphore_clone = Arc::clone(&semaphore);
-        let folder_name_clone = folder_name.clone();
-        let path_clone = path.clone();
-        
-        let task = task::spawn(async move {
-            let _permit = semaphore_clone.acquire().await.unwrap();
-            match import_single_album(&db_clone, &folder_name_clone, &path_clone).await {
-                Ok(count) => {
-                    println!("✅ 相册 {} 导入完成，共导入 {} 张图片", folder_name_clone, count);
-                    count
-                }
-                Err(e) => {
-                    eprintln!("❌ 相册 {} 导入失败: {}", folder_name_clone, e);
-                    0
-                }
-            }
-        });
-        
-        tasks.push(task);
-    }
-    
-    // 等待所有任务完成
+    // 第二阶段：串行处理相册导入，避免数据库死锁
+    // 对于SQLite，高并发写入容易导致死锁，改为串行处理
     let mut total_imported = 0;
     let mut successful_albums = 0;
     
-    for task in tasks {
-        match task.await {
+    for (folder_name, path) in album_folders {
+        println!("📁 开始导入相册: {}", folder_name);
+        
+        match import_single_album(&db, &folder_name, &path).await {
             Ok(count) => {
                 if count > 0 {
                     successful_albums += 1;
                     total_imported += count;
+                    println!("✅ 相册 {} 导入完成，共导入 {} 张图片", folder_name, count);
+                } else {
+                    println!("⚠️  相册 {} 没有图片需要导入", folder_name);
                 }
             }
             Err(e) => {
-                eprintln!("任务执行失败: {}", e);
+                eprintln!("❌ 相册 {} 导入失败: {}", folder_name, e);
+                // 继续处理下一个相册，不中断整个导入过程
             }
         }
+        
+        // 在每个相册导入后添加短暂延迟，减少数据库压力
+        tokio::time::sleep(std::time::Duration::from_millis(100)).await;
     }
     
     println!("🎉 导入完成！成功导入 {} 个相册，共 {} 张图片", successful_albums, total_imported);