diff --git a/webapp/services/BattleBoxService.php b/webapp/services/BattleBoxService.php
index d0e49678..aa7da1ff 100644
--- a/webapp/services/BattleBoxService.php
+++ b/webapp/services/BattleBoxService.php
@@ -45,6 +45,7 @@ class BattleBoxService {
             } else {
                 if ($yesterDayDropTotal >= $yesterDayAllocNum) {
                     //掉完了
+                    $costTime = 0;
                 } else {
                     //没掉完
                 }