diff --git a/example/once/main.go b/example/once/main.go
index e82b3a0..6c40c7d 100644
--- a/example/once/main.go
+++ b/example/once/main.go
@@ -30,7 +30,7 @@ func main() {
 	ch := make(chan ChanStatus, 1000)
 
 	go func() {
-		for a := 0; a < 100; a++ {
+		for a := 0; a < 10; a++ {
 			go func(a int) {
 				for status := range ch {
 					// fmt.Println("协程", a, "处理任务", status)
@@ -47,9 +47,9 @@ func main() {
 	go func() {
 		// 一千万任务，每个任务间隔1秒
 
-		for i := 0; i < 100; i++ {
+		for i := 0; i < 10; i++ {
 			runTime := t.Add(time.Duration(i) * time.Second)
-			for j := 0; j < 100; j++ {
+			for j := 0; j < 10; j++ {
 				ch <- ChanStatus{
 					I: i,
 					J: j,
diff --git a/once.go b/once.go
index c04eb04..570652e 100644
--- a/once.go
+++ b/once.go
@@ -88,6 +88,13 @@ const (
 	jobTypeList = "list"
 )
 
+type createSource string
+
+const (
+	createSourceDefault = "default"
+	createSourceRetry   = "retry"
+)
+
 // 初始化
 func InitOnce(ctx context.Context, re redis.UniversalClient, keyPrefix string, call Callback, opts ...Option) (*Once, error) {
 	op := newOptions(opts...)
@@ -411,20 +418,20 @@ func (l *Once) Create(ctx context.Context, taskType OnceTaskType, taskId string,
 		return ErrDelayTime
 	}
 	execTime := time.Now().Add(delayTime)
-	return l.create(ctx, jobTypeOnce, taskType, taskId, []time.Time{execTime}, attachData, 0)
+	return l.create(ctx, createSourceDefault, jobTypeOnce, taskType, taskId, []time.Time{execTime}, attachData, 0)
 }
 
 // 指定时间执行(不覆盖)
 func (l *Once) CreateByTime(ctx context.Context, taskType OnceTaskType, taskId string, executeTime time.Time, attachData any) error {
-	return l.create(ctx, jobTypeOnce, taskType, taskId, []time.Time{executeTime}, attachData, 0)
+	return l.create(ctx, createSourceDefault, jobTypeOnce, taskType, taskId, []time.Time{executeTime}, attachData, 0)
 }
 
 // 指定多个时间执行(不覆盖)
 func (l *Once) CreateByList(ctx context.Context, taskType OnceTaskType, taskId string, taskTimes []time.Time, attachData any) error {
-	return l.create(ctx, jobTypeList, taskType, taskId, taskTimes, attachData, 0)
+	return l.create(ctx, createSourceDefault, jobTypeList, taskType, taskId, taskTimes, attachData, 0)
 }
 
-func (l *Once) create(ctx context.Context, jobType jobType, taskType OnceTaskType, taskId string, taskTimes []time.Time, attachData any, runCount int) error {
+func (l *Once) create(ctx context.Context, source createSource, jobType jobType, taskType OnceTaskType, taskId string, taskTimes []time.Time, attachData any, runCount int) error {
 	if len(taskTimes) <= 0 {
 		l.logger.Errorf(ctx, "delay time must be positive taskType:%v taskId:%v attachData:%v runCount:%v", taskType, taskId, attachData, runCount)
 		return ErrExecuteTime
@@ -432,6 +439,20 @@ func (l *Once) create(ctx context.Context, jobType jobType, taskType OnceTaskTyp
 
 	redisKey := l.buildRedisKey(taskType, taskId)
 
+	if source != createSourceRetry {
+		// 这里加一个全局锁 从Retry来的不需要 因为已经加锁了
+		lock, err := lockx.NewGlobalLock(ctx, l.redis, l.globalLockPrefix+redisKey)
+		if err != nil {
+			l.logger.Errorf(ctx, "processTask timer:获取锁失败:%s", taskId)
+			return err
+		}
+		if b, err := lock.Lock(); !b {
+			l.logger.Errorf(ctx, "processTask timer:获取锁失败:%s %+v", taskId, err)
+			return err
+		}
+		defer lock.Unlock()
+	}
+
 	score, err := l.redis.ZScore(l.ctx, l.zsetKey, redisKey).Result()
 	if err != nil {
 		if errors.Is(err, redis.Nil) {
@@ -596,5 +617,5 @@ func (l *Once) handleRetry(ctx context.Context, taskType OnceTaskType, taskId st
 		taskType, taskId, ed.RunCount)
 
 	// 不覆盖的新建
-	return l.create(ctx, ed.JobType, taskType, taskId, ed.TaskTimes, ed.Data, ed.RunCount)
+	return l.create(ctx, createSourceRetry, ed.JobType, taskType, taskId, ed.TaskTimes, ed.Data, ed.RunCount)
 }