diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index 1c8df5d8..f64734ce 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -879,8 +879,12 @@ void RoomMgr::SendGetCustomBattleData(std::shared_ptr<cs::CMJoin> join_msg,
         cb(1, "custom battle data error", nullptr);
         return;
     }
-    std::string room_uuid = data->Get("team_uuid", "").GetString();
     int start_time = data->Get("start_time", "").GetInt();
+    if (Global::g_nowtime - start_time > 40) {
+        cb(2, "custom battle is started", nullptr);
+        return;
+    }
+    std::string room_uuid = data->Get("team_uuid", "").GetString();
     if (room_uuid.empty()) {
         cb(1, "custom battle data error", nullptr);
         return;