diff --git a/concept_api.py b/concept_api.py
index 98e79273..1370346d 100644
--- a/concept_api.py
+++ b/concept_api.py
@@ -548,12 +548,12 @@ async def search_concepts(request: SearchRequest):
                 # 已经在generate_embedding中记录了详细日志，这里只调整语义权重
                 semantic_weight = 0
 
-        # 【关键修改】：如果按涨跌幅排序，需要获取更多结果
+        # 【关键修改】：如果按涨跌幅或添加日期排序，需要获取更多结果
         effective_search_size = request.search_size
-        if request.sort_by == "change_pct":
-            # 按涨跌幅排序时，获取更多结果以确保排序准确性
+        if request.sort_by in ["change_pct", "added_date"]:
+            # 按涨跌幅或添加日期排序时，获取更多结果以确保排序准确性
             effective_search_size = min(1000, request.search_size * 10)  # 最多获取1000个
-            logger.info(f"Using expanded search size {effective_search_size} for change_pct sorting")
+            logger.info(f"Using expanded search size {effective_search_size} for {request.sort_by} sorting")
 
         # 构建查询体
         search_body = {}