diff --git a/group_auto/group_member_change.py b/group_auto/group_member_change.py
index 2b219da..789a144 100644
--- a/group_auto/group_member_change.py
+++ b/group_auto/group_member_change.py
@@ -38,7 +38,7 @@ class GroupMemberChange:
 
         result = []  # 初始化文案列表
 
-        # 如果本地没有缓存数据，则从 Redis 获取
+        # 检查是否存在本地缓存数据，如果不存在，则从 Redis 获取
         if group_id not in self.local_membercounts or group_id not in self.local_members:
             print("No local data, fetching from Redis")
             membercount_previous, members_previous = self.get_previous_data_from_redis(group_id)
@@ -56,7 +56,10 @@ class GroupMemberChange:
 
                 result.append("$NO_CHANGE$")
                 return "\n".join(result)
-
+            else:
+                # 如果 Redis 中有数据，就更新本地缓存
+                self.local_membercounts[group_id] = membercount_previous
+                self.local_members[group_id] = members_previous
         else:
             # 使用本地缓存的数据进行比较
             membercount_previous = self.local_membercounts[group_id]