diff --git a/task.go b/task.go
index f9b0e28..f7c34e8 100644
--- a/task.go
+++ b/task.go
@@ -82,8 +82,24 @@ func (d *dispatch) Run(ctx context.Context, cfg *Config) *Result {
 	var (
 		taskInstance ITask
 		exist        bool
+		cancelFunc   context.CancelFunc
 	)
 
+	if nil == ctx {
+		if cfg.Timeout > 0 {
+			ctx, cancelFunc = context.WithCancel(context.Background())
+		} else {
+			ctx = context.Background()
+		}
+	} else {
+		ctx, cancelFunc = context.WithCancel(ctx)
+	}
+
+	if nil != cancelFunc {
+		// 带了超时时间
+		cancelFunc()
+	}
+
 	result := &Result{
 		StartTime:       time.Now().UnixNano(),
 		FinishTime:      0,