diff --git a/modules/dispatch/model_dispatch.go b/modules/dispatch/model_dispatch.go
index 5196a491b..f5b6526d1 100644
--- a/modules/dispatch/model_dispatch.go
+++ b/modules/dispatch/model_dispatch.go
@@ -240,16 +240,17 @@ func (this *modelDispatch) replaceTask(uid string, taskId int32, dispatch *pb.DB
 // 替换所有完成的任务
 func (this *modelDispatch) replaceFinishedTask(uid string, dispatch *pb.DBDispatch) (tasks []*pb.DispatchTask, oldtasks []*pb.DispatchTask) {
 	var randCount int
-	for i, v := range dispatch.Nb.Tasks {
+	tmp:= dispatch.Nb.Tasks
+	for i:=0;i<len(tmp);i++ {
 		//替换状态是完成的任务
-		if v.Status == 2 {
+		if tmp[i].Status == 2 {
 			//删除
-			oldtasks = append(oldtasks, v)
+			oldtasks = append(oldtasks, tmp[i])
 			dispatch.Nb.Tasks = append(dispatch.Nb.Tasks[:i], dispatch.Nb.Tasks[i+1:]...)
 			i--
 			randCount++
 		} else {
-			tasks = append(tasks, v)
+			tasks = append(tasks, tmp[i])
 		}
 	}