diff --git a/a8/ioloop.cc b/a8/ioloop.cc
index c068cb2..c49a00e 100644
--- a/a8/ioloop.cc
+++ b/a8/ioloop.cc
@@ -265,20 +265,21 @@ namespace a8
         AsyncTcpClient* client = (AsyncTcpClient*)param.sender.GetUserData();
         client->DoAsyncConnect();
         client->connect_timer_attacher.ClearTimerList();
-        context->xtimer.AddDeadLineTimerAndAttach(
-                                                  param.param1,
-                                                  a8::XParams()
-                                                  .SetSender(client),
-                                                  [] (const a8::XParams& param)
-                                                  {
-                                                      AsyncTcpClient* client = (AsyncTcpClient*)param.sender.GetUserData();
-                                                      client->DoAsyncClose();
-                                                      if (client->on_error) {
-                                                          client->on_error(client, 111);
-                                                      }
-                                                  },
-                                                  &client->connect_timer_attacher.timer_list_
-                                                  );
+        context->xtimer.AddDeadLineTimer
+            (
+             param.param1,
+             a8::Args({}),
+             [client] (int event, const a8::Args& args, const a8::Args* user_args)
+             {
+                 if (a8::TIMER_EXEC_EVENT == event) {
+                     client->DoAsyncClose();
+                     if (client->on_error) {
+                         client->on_error(client, 111);
+                     }
+                 }
+             },
+             &client->connect_timer_attacher
+             );
     }
 
     void IoLoop::_IMAsyncClose(IoLoopThreadContext* context, a8::XParams& param)
diff --git a/a8/timer_attacher.cc b/a8/timer_attacher.cc
index bd3f8df..acd5534 100644
--- a/a8/timer_attacher.cc
+++ b/a8/timer_attacher.cc
@@ -40,12 +40,14 @@ namespace a8
 
     void XTimerAttacher::ClearTimerList()
     {
+#if 0
         struct list_head* pos = nullptr;
         struct list_head* n = nullptr;
         list_for_each_safe(pos, n, &timer_list_){
             xtimer_list* tmp_timer = xtimer->GetTimerByAttach(pos);
             xtimer->DeleteTimer(tmp_timer, is_destory_);
         }
+#endif
     }
 
 }
diff --git a/a8/types.h b/a8/types.h
index 650cb81..74b831d 100644
--- a/a8/types.h
+++ b/a8/types.h
@@ -19,6 +19,7 @@ namespace a8
     const int INVALID_FD = -1;
     const int INVALID_SOCKET = -1;
     const int INVALID_SOCKET_HANDLE = 0;
+
 };
 
 #endif
diff --git a/a8/xtimer.cc b/a8/xtimer.cc
index 775caac..ad64f97 100644
--- a/a8/xtimer.cc
+++ b/a8/xtimer.cc
@@ -41,9 +41,8 @@ struct xtimer_list {
     int fixed_timer_execute_times;
     struct xtvec_base *base;
 
-    a8::XTimerFunc timer_func;
-    a8::XTimerAfterFunc timer_after_func;
-    a8::XParams param;
+    a8::TimerCbProc cb;
+    a8::Args args;
 };
 
 struct XTimerDestoryHandleNode
@@ -104,8 +103,8 @@ static inline int DetachTimer(struct xtimer_list *timer)
 }
 
 static inline void InitTimerList(xtvec_base* base, xtimer_list* timer, int timer_type,
-                                 long long expires, int expire_time, a8::XParams& param,
-                                 a8::XTimerFunc timer_func, a8::XTimerAfterFunc timer_after_func)
+                                 long long expires, int expire_time,
+                                 a8::Args args, a8::TimerCbProc cb)
 {
     INIT_LIST_HEAD(&timer->destory_handle_list);
     INIT_LIST_HEAD(&timer->entry);
@@ -115,9 +114,8 @@ static inline void InitTimerList(xtvec_base* base, xtimer_list* timer, int timer
     timer->expire_time = expire_time;
     timer->fixed_timer_execute_times = 0;
     timer->base = base;
-    timer->timer_func = timer_func;
-    timer->timer_after_func = timer_after_func;
-    timer->param = param;
+    timer->cb = std::move(cb);
+    timer->args = std::move(args);
 }
 
 namespace a8
@@ -158,12 +156,25 @@ namespace a8
         context_ = context;
         gc_time_ = gc_time;
         cache_timer_num_ = cache_timer_num;
-        #if 1
         base_->timer_tick = get_tick_count_func_(context_);
-        #endif
-        AddRepeatTimer(gc_time_,
-                       a8::XParams().SetSender(this),
-                       &XTimer::GC_XTimerFunc);
+        AddRepeatTimer
+            (gc_time_,
+             a8::Args({}),
+             [this] (int event, const a8::Args& args, const a8::Args* user_args)
+             {
+                 if (a8::TIMER_EXEC_EVENT == event) {
+                     int i = 0;
+                     while (!list_empty(&base_->free_timer) &&
+                            base_->free_timer_num > cache_timer_num_ && i < 1000) {
+                         xtimer_list* timer = list_first_entry(&base_->free_timer, struct xtimer_list, entry);
+                         list_del_init(&timer->entry);
+                         delete timer;
+
+                         base_->free_timer_num--;
+                         ++i;
+                     }
+                 }
+             });
     }
 
     void XTimer::Update()
@@ -173,6 +184,98 @@ namespace a8
         }
     }
 
+    #if 1
+
+    void XTimer::AddDeadLineTimer(
+                                  int expire_time,
+                                  a8::Args args,
+                                  a8::TimerCbProc timer_cb,
+                                  a8::XTimerAttacher* attacher
+                                  )
+    {
+
+    }
+
+    std::weak_ptr<XTimerPtr> XTimer::AddDeadLineTimerEx(
+                                                        int expire_time,
+                                                        a8::Args args,
+                                                        a8::TimerCbProc timer_cb,
+                                                        a8::XTimerAttacher* attacher
+                                                        )
+    {
+
+    }
+
+    void XTimer::AddRepeatTimer(
+                                int expire_time,
+                                a8::Args args,
+                                a8::TimerCbProc timer_cb,
+                                a8::XTimerAttacher* attacher)
+    {
+
+    }
+
+    std::weak_ptr<XTimerPtr> XTimer::AddRepeatTimerEx(
+                                                      int expire_time,
+                                                      a8::Args args,
+                                                      a8::TimerCbProc timer_cb,
+                                                      a8::XTimerAttacher* attacher)
+    {
+
+    }
+
+    void XTimer::FireUserEvent(std::weak_ptr<XTimerPtr>& timer_ptr, a8::Args& args)
+    {
+
+    }
+
+    void XTimer::ModifyTimer(std::weak_ptr<XTimerPtr>& timer_ptr, int expire_time)
+    {
+
+    }
+
+    void XTimer::DeleteTimer(std::weak_ptr<XTimerPtr>& timer_ptr)
+    {
+
+    }
+
+    long long XTimer::GetRemainTime(std::weak_ptr<XTimerPtr>& timer_ptr)
+    {
+
+    }
+
+    void XTimer::DestoryTimer(std::weak_ptr<XTimerPtr>& timer_ptr)
+    {
+
+    }
+
+    xtimer_list* XTimer::GetTimerByAttach(list_head* attach_entry)
+    {
+
+    }
+
+    xtimer_list* XTimer::GetRunningTimer()
+    {
+
+    }
+
+    XTimerDestoryHandle* XTimer::AddTimerDestoryHandle(std::weak_ptr<XTimerPtr>& timer_ptr,
+                                                       std::function<void(xtimer_list*)> cb)
+    {
+
+    }
+
+    void XTimer::RemoveTimerDestoryHandle(XTimerDestoryHandle* handle)
+    {
+
+    }
+
+    void XTimer::DeleteRunningTimer()
+    {
+
+    }
+
+    #else
     xtimer_list* XTimer::AddDeadLineTimer(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
                                         a8::XTimerAfterFunc timer_after_func)
     {
@@ -428,21 +531,6 @@ namespace a8
         free_timers(&base_->free_timer);
     }
 
-    void XTimer::GC_XTimerFunc(const a8::XParams& param)
-    {
-        XTimer* timer = (XTimer*)param.sender.GetUserData();
-        int i = 0;
-        while (!list_empty(&timer->base_->free_timer) &&
-               timer->base_->free_timer_num > timer->cache_timer_num_ && i < 1000) {
-            xtimer_list* timer1 = list_first_entry(&timer->base_->free_timer, struct xtimer_list, entry);
-            list_del_init(&timer1->entry);
-            delete timer1;
-
-            timer->base_->free_timer_num--;
-            i++;
-        }
-    }
-
     XTimerDestoryHandle* XTimer::AddTimerDestoryHandle(xtimer_list* timer,
                                                        std::function<void(xtimer_list*)> cb)
     {
@@ -482,5 +570,6 @@ namespace a8
             DeleteTimer(ptr.lock()->timer);
         }
     }
+    #endif
 
 }
diff --git a/a8/xtimer.h b/a8/xtimer.h
index 5d17adb..6c8c10a 100644
--- a/a8/xtimer.h
+++ b/a8/xtimer.h
@@ -1,5 +1,5 @@
 /*
- * 仿照linux2.6内核定时器实现
+ * linux2.6内核定时器实现
  */
 #ifndef A8_XTIMER_H
 #define A8_XTIMER_H
@@ -8,8 +8,14 @@ struct xtimer_list;
 struct xtvec_base;
 namespace a8
 {
-    typedef void (*XTimerFunc)(const a8::XParams& param);
-    typedef void (*XTimerAfterFunc)(const a8::XParams& param, bool is_destory);
+
+    const int TIMER_EXEC_EVENT = 1;
+    const int TIMER_DELETE_EVNET = 2;
+    const int TIMER_DESTORY_EVNET = 3;
+    const int TIMER_USER_EVNET = 66;
+
+    typedef std::function<void(int, const a8::Args&, const a8::Args*)> TimerCbProc;
+
     typedef long long (*XGetTickCountFunc)(void*);
     typedef struct list_head XTimerDestoryHandle;
     struct XTimerPtr;
@@ -25,48 +31,63 @@ namespace a8
         void Update();
 
         //添加截止时间定时器(一次性定时器)
-        xtimer_list* AddDeadLineTimer(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
-                                     a8::XTimerAfterFunc timer_after_func = nullptr);
-        xtimer_list* AddDeadLineTimerAndAttach(int expire_time, a8::XParams,
-                                               a8::XTimerFunc timer_func,
-                                               list_head* attach_list,
-                                               a8::XTimerAfterFunc timer_after_func = nullptr);
+        void AddDeadLineTimer(
+                              int expire_time,
+                              a8::Args args,
+                              a8::TimerCbProc timer_cb,
+                              a8::XTimerAttacher* attacher = nullptr
+                              );
+
+        std::weak_ptr<XTimerPtr> AddDeadLineTimerEx(
+                                                    int expire_time,
+                                                    a8::Args args,
+                                                    a8::TimerCbProc timer_cb,
+                                                    a8::XTimerAttacher* attacher = nullptr
+                                                    );
+
         //添加重复执行定时器(周期性定时器)
-        xtimer_list* AddRepeatTimer(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
-                                    a8::XTimerAfterFunc timer_after_func = nullptr);
-        xtimer_list* AddRepeatTimerAndAttach(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
-                                             list_head* attach_list,
-                                             a8::XTimerAfterFunc timer_after_func = nullptr);
+        void AddRepeatTimer(
+                              int expire_time,
+                              a8::Args args,
+                              a8::TimerCbProc timer_cb,
+                              a8::XTimerAttacher* attacher = nullptr);
+
+        std::weak_ptr<XTimerPtr> AddRepeatTimerEx(
+                              int expire_time,
+                              a8::Args args,
+                              a8::TimerCbProc timer_cb,
+                              a8::XTimerAttacher* attacher = nullptr);
+
+        //发送用户事件
+        void FireUserEvent(std::weak_ptr<XTimerPtr>& timer_ptr, a8::Args& args);
+
         //修改定时器参数
-        void ModifyTimer(xtimer_list* timer, int expire_time);
-        void ModifyTimer(std::weak_ptr<XTimerPtr>& ptr, int expire_time);
+        void ModifyTimer(std::weak_ptr<XTimerPtr>& timer_ptr, int expire_time);
         //删除定时器
-        void DeleteTimer(xtimer_list* timer, bool is_destory = false);
+        void DeleteTimer(std::weak_ptr<XTimerPtr>& timer_ptr);
+        //获取定时器剩余时间
+        long long GetRemainTime(std::weak_ptr<XTimerPtr>& timer_ptr);
+        //删除当前运行中定时器
+        void DeleteRunningTimer();
+
+    protected:
+        //销毁定时器
+        void DestoryTimer(std::weak_ptr<XTimerPtr>& timer_ptr);
         //通过关联的list_head获取定时器对象
         xtimer_list* GetTimerByAttach(list_head* attach_entry);
-        //获取定时器关联参数
-        a8::XParams* MutableParams(xtimer_list* timer);
-        a8::XParams* MutableParams(std::weak_ptr<XTimerPtr>& ptr);
-        //获取定时器剩余时间
-        long long GetRemainTime(xtimer_list* timer);
         //获取当前正在运行的定时器
         xtimer_list* GetRunningTimer();
         //添加定时器销毁事件
-        XTimerDestoryHandle* AddTimerDestoryHandle(xtimer_list* timer,
+        XTimerDestoryHandle* AddTimerDestoryHandle(std::weak_ptr<XTimerPtr>& timer_ptr,
                                                    std::function<void(xtimer_list*)> cb);
         //移除定时器销毁事件
         void RemoveTimerDestoryHandle(XTimerDestoryHandle* handle);
-        //获取定时器弱引用
-        std::weak_ptr<XTimerPtr> GetTimerPtr(xtimer_list* timer);
-        //删除弱引用指向的定时器
-        void DeleteTimer(std::weak_ptr<XTimerPtr>& ptr);
 
     private:
         void UpdateTimer();
         xtimer_list* NewTimerList();
         void AddToFreeList(xtimer_list* timer);
         void Clear();
-        static void GC_XTimerFunc(const a8::XParams& param);
 
     private:
         xtvec_base* base_ = nullptr;