diff --git a/Utils/Dy/DyUtils.py b/Utils/Dy/DyUtils.py
index cf52fec..2ff79bf 100644
--- a/Utils/Dy/DyUtils.py
+++ b/Utils/Dy/DyUtils.py
@@ -685,6 +685,12 @@ class DouYinMessageHandler:
         self.sign_engine_initialized = False
         self.sign_ctx = None
         self.js_engine = None
+        
+        # 🧹 启动时清理超过24小时的旧临时文件
+        self._cleanup_old_temp_files(max_age_hours=24)
+        
+        # 🧹 设置定期清理任务（每6小时清理一次）
+        self._setup_periodic_cleanup()
 
         # 打印实例创建信息
         print(f"[DY Handler] 创建实例 {self.instance_id} for store {store_id}")
@@ -2079,8 +2085,9 @@ class DouYinMessageHandler:
                         continue
                     return None, None
                 
-                # 保存到临时文件
-                temp_dir = os.path.join(os.path.dirname(__file__), "temp_uploads")
+                # 保存到临时文件（使用系统临时目录，兼容打包环境）
+                import tempfile
+                temp_dir = os.path.join(tempfile.gettempdir(), "shuidrop_temp_uploads")
                 os.makedirs(temp_dir, exist_ok=True)
                 
                 # 🔥 修复：智能提取文件扩展名
@@ -2113,7 +2120,7 @@ class DouYinMessageHandler:
         return None, None
     
     def _cleanup_temp_file(self, file_path):
-        """清理临时文件"""
+        """清理单个临时文件"""
         try:
             if file_path and os.path.exists(file_path):
                 os.remove(file_path)
@@ -2121,6 +2128,76 @@ class DouYinMessageHandler:
         except Exception as e:
             self._log(f"⚠️ [DY上传] 删除临时文件失败: {e}", "WARNING")
     
+    def _cleanup_old_temp_files(self, max_age_hours=24):
+        """
+        清理超过指定时间的旧临时文件
+        
+        Args:
+            max_age_hours: 文件最大保留时间（小时），默认24小时
+        """
+        try:
+            import tempfile
+            import time
+            
+            temp_dir = os.path.join(tempfile.gettempdir(), "shuidrop_temp_uploads")
+            if not os.path.exists(temp_dir):
+                return
+            
+            current_time = time.time()
+            max_age_seconds = max_age_hours * 3600
+            cleaned_count = 0
+            total_size = 0
+            
+            # 遍历临时目录
+            for filename in os.listdir(temp_dir):
+                file_path = os.path.join(temp_dir, filename)
+                
+                # 跳过目录
+                if not os.path.isfile(file_path):
+                    continue
+                
+                try:
+                    # 检查文件修改时间
+                    file_mtime = os.path.getmtime(file_path)
+                    file_age = current_time - file_mtime
+                    
+                    # 如果文件超过保留时间，删除
+                    if file_age > max_age_seconds:
+                        file_size = os.path.getsize(file_path)
+                        os.remove(file_path)
+                        cleaned_count += 1
+                        total_size += file_size
+                        self._log(f"🗑️ [清理] 删除过期临时文件: {filename} (已存在{file_age/3600:.1f}小时)", "DEBUG")
+                
+                except Exception as e:
+                    self._log(f"⚠️ [清理] 删除文件失败 {filename}: {e}", "WARNING")
+                    continue
+            
+            if cleaned_count > 0:
+                self._log(f"✅ [清理] 已清理 {cleaned_count} 个过期临时文件，释放空间: {total_size/(1024*1024):.2f}MB", "INFO")
+            else:
+                self._log(f"✅ [清理] 无需清理（所有临时文件都在保留期内）", "DEBUG")
+                
+        except Exception as e:
+            self._log(f"⚠️ [清理] 清理旧临时文件失败: {e}", "WARNING")
+    
+    def _setup_periodic_cleanup(self):
+        """设置定期清理任务（每6小时清理一次超过24小时的文件）"""
+        import threading
+        
+        def periodic_cleanup_task():
+            import time
+            while self.is_running:
+                # 每6小时清理一次
+                time.sleep(6 * 3600)  # 6小时
+                if self.is_running:
+                    self._cleanup_old_temp_files(max_age_hours=24)
+        
+        # 在后台线程中运行定期清理任务
+        cleanup_thread = threading.Thread(target=periodic_cleanup_task, daemon=True, name="TempFileCleanup")
+        cleanup_thread.start()
+        self._log("🧹 [清理] 定期清理任务已启动（每6小时执行一次）", "DEBUG")
+    
     async def _get_upload_token(self, upload_type="image"):
         """获取上传Token（图片或视频）"""
         try:
@@ -2209,14 +2286,15 @@ class DouYinMessageHandler:
             if not upload_id:
                 return None
             
-            success = await self._upload_file_part(store_uri, authorization, image_path, step=2, upload_id=upload_id)
+            # 🔥 优化：只读取一次文件，计算CRC32并传递给step2和step3
+            with open(image_path, 'rb') as f:
+                file_content = f.read()
+            crc32_hex = format(zlib.crc32(file_content), '08x')
+            
+            success = await self._upload_file_part(store_uri, authorization, image_path, step=2, upload_id=upload_id, file_content=file_content, crc=crc32_hex)
             if not success:
                 return None
             
-            with open(image_path, 'rb') as f:
-                content = f.read()
-            crc32_hex = format(zlib.crc32(content), '08x')
-            
             success = await self._upload_file_part(store_uri, authorization, image_path, step=3, upload_id=upload_id, crc=crc32_hex)
             if not success:
                 return None
@@ -2299,8 +2377,12 @@ class DouYinMessageHandler:
             self._log(f"❌ [DY图片] {action}失败: {e}", "ERROR")
             return None
     
-    async def _upload_file_part(self, uri, authorization, file_path, step, crc=None, upload_id=None):
-        """上传图片文件分片（带超时和重试）"""
+    async def _upload_file_part(self, uri, authorization, file_path, step, crc=None, upload_id=None, file_content=None):
+        """上传图片文件分片（带超时和重试）
+        
+        Args:
+            file_content: 文件内容（step=2时直接使用，避免重复读取）
+        """
         try:
             headers = {
                 "Authorization": authorization,
@@ -2323,9 +2405,19 @@ class DouYinMessageHandler:
                 return response.json().get("payload", {}).get("uploadID")
                 
             elif step == 2:
-                with open(file_path, 'rb') as f:
-                    content = f.read()
-                headers["Content-Crc32"] = format(zlib.crc32(content), '08x')
+                # 🔥 优化：如果传入了file_content，直接使用；否则读取文件（兼容旧代码）
+                if file_content is None:
+                    with open(file_path, 'rb') as f:
+                        content = f.read()
+                else:
+                    content = file_content
+                
+                # 使用传入的crc或重新计算（优先使用传入的）
+                if crc:
+                    headers["Content-Crc32"] = crc
+                else:
+                    headers["Content-Crc32"] = format(zlib.crc32(content), '08x')
+                
                 headers["Content-Length"] = str(len(content))
                 headers["Content-Type"] = 'application/octet-stream'
                 params = {"partNumber": "1", "uploadID": upload_id}