diff --git a/apps/worker/video_processing/processor.py b/apps/worker/video_processing/processor.py
index 7af9dbf6b..236b602c5 100644
--- a/apps/worker/video_processing/processor.py
+++ b/apps/worker/video_processing/processor.py
@@ -61,18 +61,27 @@ class VideoProcessor:
         # 确保输出目录存在
         os.makedirs(os.path.dirname(output_path), exist_ok=True)
 
+        # P2-6 Fix: 使用 try-finally 确保临时文件清理
+        concat_file = None
         try:
-            # 创建临时文件列表
-            concat_file = os.path.join(self.temp_dir, f"concat_{os.getpid()}.txt")
-            with open(concat_file, "w") as f:
-                for path in input_paths:
-                    # FFmpeg concat demuxer 格式
-                    f.write(f"file '{os.path.abspath(path)}'\n")
+            # 使用 NamedTemporaryFile 确保临时文件正确清理
+            concat_file = tempfile.NamedTemporaryFile(
+                mode="w",
+                suffix=".txt",
+                prefix="ffmpeg_concat_",
+                dir=self.temp_dir,
+                delete=True,
+            )
+            for path in input_paths:
+                # FFmpeg concat demuxer 格式
+                concat_file.write(f"file '{os.path.abspath(path)}'\n")
+            concat_file.flush()
+            concat_file_path = concat_file.name
 
             # 使用 FFmpeg 拼接视频
             width, height = resolution
             (
-                ffmpeg.input(concat_file, format="concat", safe=0)
+                ffmpeg.input(concat_file_path, format="concat", safe=0)
                 .output(
                     output_path,
                     vcodec="libx264",
@@ -86,9 +95,6 @@ class VideoProcessor:
                 .run(capture_stdout=True, capture_stderr=True)
             )
 
-            # 清理临时文件
-            os.remove(concat_file)
-
             # 获取视频元数据
             probe = ffmpeg.probe(output_path)
             video_info = next(s for s in probe["streams"] if s["codec_type"] == "video")
@@ -120,6 +126,13 @@ class VideoProcessor:
         except ffmpeg.Error as e:
             stderr = e.stderr.decode() if e.stderr else ""
             raise RuntimeError(f"FFmpeg error: {stderr}") from e
+        finally:
+            # P2-6 Fix: 确保临时文件在所有情况下都被清理
+            if concat_file is not None:
+                try:
+                    concat_file.close()
+                except Exception:
+                    pass  # 忽略关闭时的错误
 
     def generate_thumbnail(
         self,