diff --git a/monitors/monitorHelper.go b/monitors/monitorHelper.go
index ff78aec..aaf9a20 100644
--- a/monitors/monitorHelper.go
+++ b/monitors/monitorHelper.go
@@ -12,7 +12,9 @@ type MonitorHelper struct {
 
 func (the *MonitorHelper) initial() {
 	the.Cron = cron.New()
-	log.Printf("cronStr=%s", the.CronStr)
+	if the.CronStr != "" {
+		log.Printf("cronStr=%s", the.CronStr)
+	}
 }
 
 // RegisterTask 注册定时器方法