diff --git a/apps/api/app/api/routes/generation_tasks.py b/apps/api/app/api/routes/generation_tasks.py
index e982bb248..325c76c72 100755
--- a/apps/api/app/api/routes/generation_tasks.py
+++ b/apps/api/app/api/routes/generation_tasks.py
@@ -124,10 +124,19 @@ def _select_assets_from_library(
         return [a.id for a in selected]
 
     if mode == "smart":
-        # 智能匹配：多维度综合评分 + 时长多样性保证
-        selector = SmartAssetSelector()
-        result = selector.select(ready_video_assets, count=count, ensure_diversity=True)
-        return result.selected_ids
+        # 智能匹配：按质量分降序 + 时长降序作为tiebreaker
+        # 注意：这里使用简单的 quality_score 排序保持向后兼容
+        # 更复杂的4维评分+多样性策略由 SmartAssetSelector 服务提供（用于 AI 精选等场景）
+        scored_assets = sorted(
+            ready_video_assets,
+            key=lambda a: (
+                -(a.quality_score if a.quality_score is not None else 0.0),
+                -(getattr(a, "duration", 0.0) or 0.0),
+            ),
+        )
+        if count > 0:
+            scored_assets = scored_assets[:count]
+        return [a.id for a in scored_assets]
 
     # 默认 all 模式：返回全部 ready 视频素材
     return [a.id for a in ready_video_assets]