diff --git a/crontab.go b/crontab.go
index 257e562..923584a 100644
--- a/crontab.go
+++ b/crontab.go
@@ -67,6 +67,21 @@ func NewCrontab(crontab string) *Crontab {
 	return cron
 }
 
+// UnmarshalYAML 添加序列化接口 Marshal没实现, 需要的时候可以自己添加
+func (cron *Crontab) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var buf string
+	err := unmarshal(&buf)
+	if err != nil {
+		return nil
+	}
+
+	if err := cron.FromString(buf); err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // SetStatus 设置状态 接口定义
 func (cron *Crontab) SetStatus(status interface{}) {
 
@@ -119,13 +134,13 @@ func (cron *Crontab) FromString(crontab string) error {
 	switch mlen {
 	case 1:
 		// "f1-2|5-10x5,f1|10m,10-15,f1"
-		cron.nextTime = time.Now()
+
 		cron.lastStatus = true
 		cron.interval = clinked.NewCircularLinked()
 		var intervalList []interface{}
 		intervalList = parseIntervalString(matches[0])
 		cron.interval.Append(intervalList...)
-
+		cron.TimeUp()
 	case 5:
 		cron.min = createTimePointer(matches[0], 0, 59, true)
 		cron.hour = createTimePointer(matches[1], 0, 23, true)
@@ -134,6 +149,7 @@ func (cron *Crontab) FromString(crontab string) error {
 		cron.week = createTimePointer(matches[4], 0, 6, true)
 
 		cron.createYearPlan()
+		cron.TimeUp()
 	default:
 		return errors.New("mathches len != want, check crontab string")
 	}