diff --git a/webapp/services/CircuitRankingService.php b/webapp/services/CircuitRankingService.php
index e2f3d115..fadc7ad1 100644
--- a/webapp/services/CircuitRankingService.php
+++ b/webapp/services/CircuitRankingService.php
@@ -33,6 +33,7 @@ class CircuitRankingService extends BaseService {
         foreach ($rows as $row) {
             $androidHash[$row['account_id']] = $row;
         }
+        $androidHashDb = self::getAndroidHashDb($androidHash);
         if (count($androidHash) < 100) {
             for ($i = count($androidHash); $i < 100; $i++) {
 
@@ -40,6 +41,24 @@ class CircuitRankingService extends BaseService {
         }
     }
 
+    public static function getAndroidHashDb($alreadyAndroidHash)
+    {
+        $androidHash = array();
+        $rows = SqlHelper::ormSelectOne
+             ($this->_getMysql(''),
+              't_android',
+              array(
+                  'used' => 0
+              )
+             );
+        foreach ($rows as $row) {
+            if (!array_key_exists($row['robot_id'], $alreadyAndroidHash)) {
+                $androidHash[$row['robot_id']] = $row;
+            }
+        }
+        return $androidHash;
+    }
+
     public static function repairRanking($currentCircuitMeta)
     {
         $rows = myself()->_callModelStatic('Circuit', 'getCircuitList',