diff --git a/System/Crontab.php b/System/Crontab.php
index 205118d1..dfe015ed 100644
--- a/System/Crontab.php
+++ b/System/Crontab.php
@@ -35,7 +35,7 @@ class Crontab extends Component
 
 		$crontab = ['isLoop' => $isLoop, 'handler' => $handler, 'tick' => $tickTime, 'params' => $params];
 
-		$redis->zAdd('system:crontab', $executeTime, serialize($crontab));
+		$redis->zAdd('system:crontab', (string)$executeTime, serialize($crontab));
 	}
 
 }
diff --git a/System/Process/CrontabProcess.php b/System/Process/CrontabProcess.php
index e0005ecc..d147b7a1 100644
--- a/System/Process/CrontabProcess.php
+++ b/System/Process/CrontabProcess.php
@@ -73,8 +73,9 @@ class CrontabProcess extends Process
 		$score = time();
 		$redis = Snowflake::app()->getRedis();
 
-		$lists = $redis->zRangeByScore('system:crontab', (string)$score, (string)$score);
-		$redis->zRemRangeByScore('system:crontab', (string)$score, (string)$score);
+		$lists = $redis->zRangeByScore('system:crontab', '0', (string)$score);
+		var_dump($lists);
+		$redis->zRemRangeByScore('system:crontab', '0', (string)$score);
 
 		$barrier = Barrier::make();
 		foreach ($lists as $list) {