diff --git a/pikpakFs.py b/pikpakFs.py
index c57c1b3..2c43e85 100644
--- a/pikpakFs.py
+++ b/pikpakFs.py
@@ -8,6 +8,12 @@ import logging
 from enum import Enum
 import asyncio
 
+class DownloadTaskStatus(Enum):
+    pending = "pending"
+    downloading = "downloading"
+    done = "done"
+    error = "error"
+    stopped = "stopped"
 
 class PKTaskStatus(Enum):
     pending_offline_download = "pending"
@@ -16,6 +22,7 @@ class PKTaskStatus(Enum):
     downloading = "downloading"
     done = "done"
     error = "error"
+    stopped = "stopped"
 
 class PkTask:
     id = 0
@@ -33,6 +40,13 @@ class PkTask:
         self.url = None
         self.pkTaskId = None
 
+class DownloadTask:
+    def __init__(self, nodeId : str, pkTaskId : str, status : DownloadTaskStatus = DownloadTaskStatus.pending):
+        self.status = status
+        self.recoverStatus = status
+        self.pkTaskId = pkTaskId
+        self.nodeId = nodeId
+
 class PathWalker():
     def __init__(self, pathStr : str, sep : str = "/"):
         self.__pathSpots : list[str] = []
@@ -135,26 +149,23 @@ class PKFs:
             waitTime = waitTime * 1.5
 
     async def _task_worker(self, task : PkTask):
-        while task.status != PKTaskStatus.done and task.status != PKTaskStatus.error:
+        while task.status not in {PKTaskStatus.done, PKTaskStatus.error, PKTaskStatus.stopped}:
             try:
                 if task.status == PKTaskStatus.pending_offline_download:
-                    await self._task_pending(task) 
-                    continue
-
-                if task.status == PKTaskStatus.offline_downloading:
+                    await self._task_pending(task)
+                elif task.status == PKTaskStatus.offline_downloading:
                     await self._task_offline_downloading(task)
-                    continue
-
-                if task.status == PKTaskStatus.pending_download:
+                elif task.status == PKTaskStatus.pending_download:
                     task.status = PKTaskStatus.done
-                    pass
-
-                break
+                else:
+                    break
             except Exception as e:
-                logging.error(f"task failed, exception occured: {e}")
-                task.recoverStatus = task.status                  
+                logging.error(f"task failed, exception occurred: {e}")
+                task.recoverStatus = task.status
                 task.status = PKTaskStatus.error
 
+    
+
     def RunTask(self, task : PkTask):
         self.tasks.append(task)
         if task.runningTask is None or task.runningTask.done():
diff --git a/readme.md b/readme.md
index 8281d2e..841322f 100644
--- a/readme.md
+++ b/readme.md
@@ -6,9 +6,12 @@ Todo:
 
 - [x] 实现自定义根路径
 - [x] 异步输出频率过高会导致卡死，似乎会多创建一个线程
-- [ ] 实现Task队列管理
-- [ ] 自动刷新文件系统缓存
-- [ ] 分析以下方法的返回值：offline_file_info、offline_list
+- [x] 实现Task队列管理
+- [x] 自动刷新文件系统缓存
+- [x] 分析以下方法的返回值：offline_file_info、offline_list
+- [ ] 实现本地下载队列（多文件，文件夹）
+- [ ] 实现任务暂停、继续、恢复
+- [ ] 持久化数据
 
 
 ### 记录