diff --git a/webapp/services/BattleBoxService.php b/webapp/services/BattleBoxService.php
index 1402f282..ed6affa2 100644
--- a/webapp/services/BattleBoxService.php
+++ b/webapp/services/BattleBoxService.php
@@ -6,8 +6,8 @@ require_once('mt/Parameter.php');
 
 class BattleBoxService {
 
-    const DAILY_PHASE_DROP_LAST_TIME_KEY = '';
-    const DAILY_PHASE_DROP_TOTAL_KEY = '';
+    const DAILY_PHASE_DROP_LAST_TIME_KEY = ':';
+    const DAILY_PHASE_DROP_TOTAL_KEY = ':';
 
     public static function allocBox()
     {
@@ -23,17 +23,17 @@ class BattleBoxService {
         return 0;
     }
 
-    private static function getDailyPhaseDropLastTime($phase, $lastTime)
+    private static function getDailyPhaseDropLastTime($phase, $time)
     {
-        $key = self::DAILY_PHASE_DROP_LAST_TIME_KEY . $phase . ':' . $lastTime;
+        $key = self::DAILY_PHASE_DROP_LAST_TIME_KEY . $phase . ':' . $time;
         $r = $this->_getRedis($key);
-        $time = $r->get($key);
-        return empty($time) ? 0 : $time;
+        $lastTime = $r->get($key);
+        return empty($lastTime) ? 0 : $lastTime;
     }
 
-    private static function getDailyPhaseDropTotalNum($phase, $lastTime)
+    private static function getDailyPhaseDropTotalNum($phase, $time)
     {
-        $key = self::DAILY_PHASE_DROP_TOTAL_KEY . $phase . ':' . $lastTime;
+        $key = self::DAILY_PHASE_DROP_TOTAL_KEY . $phase . ':' . $time;
         $r = $this->_getRedis($key);
         $num = $r->get($key);
         return empty($num) ? 0 : $num;