diff --git a/ad_interface_tornado.py b/ad_interface_tornado.py
index ef2e328..4c4414a 100644
--- a/ad_interface_tornado.py
+++ b/ad_interface_tornado.py
@@ -154,12 +154,16 @@ class DispatchHandler(tornado.web.RequestHandler):
 					# 如果取得的记录条数大于预设，扔掉多余的记录,当前采用的是随机选择，以后可能需要添加加权选择
 					id_list = []
 					if limit < len(ids):
-						for i in range(limit):
-							while 1:
-								new = my_redis.srandmember(key)
-								if new not in id_list:
-									id_list.append(new)
-									break
+						nums=limit
+					else:
+						nums=len(ids)
+
+					for i in range(nums):
+						while 1:
+							new = my_redis.srandmember(key)
+							if new not in id_list:
+								id_list.append(new)
+								break
 					for id in id_list:
 						temp = my_redis.hgetall(f"ad::{id}::info")
 						info.append(temp)