diff --git a/webapp/models/BigData.php b/webapp/models/BigData.php
index 0a3d6101..776457e6 100644
--- a/webapp/models/BigData.php
+++ b/webapp/models/BigData.php
@@ -19,7 +19,7 @@ class BigData extends BaseModel {
                 'type' => $type,
             )
         );
-        return $row ? $row['data'] : null;
+        return $row ? json_decode($row['data'], true) : null;
     }
 
 
diff --git a/webapp/services/MissionService.php b/webapp/services/MissionService.php
index 0db78ea6..a9ef4e78 100644
--- a/webapp/services/MissionService.php
+++ b/webapp/services/MissionService.php
@@ -551,7 +551,7 @@ class MissionService extends BaseService {
     {
         $this->offerRewartdMission['refreshtime'] = myself()->_getNowTime();
         $sentMissions = array();
-        foreach ($this->offerRewartdMission as $mission) {
+        foreach ($this->offerRewartdMission['missions'] as $mission) {
             if ($mission['sendtime'] > 0) {
                 array_push($sentMissions, $mission);
             }
@@ -578,6 +578,7 @@ class MissionService extends BaseService {
                            ));
             }
         }
+        BigData::setData(BigData::OFFER_REWARD_MISSION_TYPE, json_encode($this->offerRewartdMission));
     }
 
     public function getOfferRewardMissions()