diff --git a/video-gen-api/app/api/v1/generation.py b/video-gen-api/app/api/v1/generation.py
index 9f82010e..d2bf5fa4 100644
--- a/video-gen-api/app/api/v1/generation.py
+++ b/video-gen-api/app/api/v1/generation.py
@@ -271,6 +271,9 @@ async def optimize(
     db: AsyncSession = Depends(get_db),
 ):
     record = None
+    # 积分不足直接返回
+    if (current_user.credits or 0) < 5:
+        raise HTTPException(status_code=402, detail="积分不足，请充值")
     # Validate parameters based on generation type
     if req.gen_type == GenerationType.video:
         if req.duration not in DURATIONS: