diff --git a/apps/api/app/api/routes/generation_preview.py b/apps/api/app/api/routes/generation_preview.py
index ce6961c4c..bc9f73bea 100755
--- a/apps/api/app/api/routes/generation_preview.py
+++ b/apps/api/app/api/routes/generation_preview.py
@@ -322,6 +322,7 @@ def create_preview_generation_task(
 
                 if asset_urls:
                     analyses = mk_client.analyze_videos(
+                        prompt="分析这个视频的主要内容，描述场景、物体、人物动作和主题",
                         video_urls=asset_urls,
                         level="Economy",
                         poll_interval=2.0,