diff --git a/app/services/cmd_service/cmd_service.go b/app/services/cmd_service/cmd_service.go
index e964f0d..946cae5 100644
--- a/app/services/cmd_service/cmd_service.go
+++ b/app/services/cmd_service/cmd_service.go
@@ -50,7 +50,9 @@ func Add(request *backend.CmdAddRequest) (err error) {
 	var db croncmdmodel.CronCmd
 	_ = mapstructure.Decode(request, &db)
 	db.Status = common.CMD_STATUS_STOP
-
+	if db.MatchJson == "" {
+		db.MatchJson = "{}"
+	}
 	_, err = croncmdmodel.GetInstance().GetDb().InsertOne(db)
 	return
 }