diff --git a/webapp/services/RoomBattleDataService.php b/webapp/services/RoomBattleDataService.php
index 4d55d4ce..19d37056 100644
--- a/webapp/services/RoomBattleDataService.php
+++ b/webapp/services/RoomBattleDataService.php
@@ -262,7 +262,7 @@ class RoomBattleDataService extends BaseService {
             $chestLootProbArr = explode(";",$rewardMeta['chestLootProb']);
             $rate = isset($chestLootProbArr[$teamRank-1]) ? $chestLootProbArr[$teamRank-1] : 0;
             //error_log(json_encode($member));
-            if ($rate > 0 && !empty($member['box_num'])){
+            if ($rate > 0 && !empty($member['box_num']) && myself()->_switchIsOpen('bigEventBoxDrop')){
                 $rewardBox = array();
                 for ($i = 0; $i < $member['box_num']; ++$i) {
                     $rand = $rate * 100;