diff --git a/a8/timer.cc b/a8/timer.cc
index f2ff875..95e3b7c 100644
--- a/a8/timer.cc
+++ b/a8/timer.cc
@@ -205,10 +205,11 @@ namespace a8
         return timer;
     }
 
-    timer_list* Timer::AddFixedTimer(int milli_seconds, a8::XParams param, a8::TimerFunc timer_func)
+    timer_list* Timer::AddFixedTimer(int milli_seconds, a8::XParams param, a8::TimerFunc timer_func,
+                                     a8::TimerAfterFunc timer_after_func)
     {
         timer_list *timer = NewTimerList();
-        InitTimerList(base_, timer, 2, milli_seconds, param, timer_func, nullptr);
+        InitTimerList(base_, timer, 2, milli_seconds, param, timer_func, timer_after_func);
         ModifyTimer(timer, milli_seconds);
         return timer;
     }
@@ -216,9 +217,10 @@ namespace a8
     timer_list* Timer::AddFixedTimerAndAttach(int milli_seconds,
                                               a8::XParams param,
                                               a8::TimerFunc timer_func,
-                                              list_head* attach_list)
+                                              list_head* attach_list,
+                                              a8::TimerAfterFunc timer_after_func)
     {
-        timer_list *timer = AddFixedTimer(milli_seconds, param, timer_func);
+        timer_list *timer = AddFixedTimer(milli_seconds, param, timer_func, timer_after_func);
         list_add_tail(&timer->attach_entry, attach_list);
         return timer;
     }
diff --git a/a8/timer.h b/a8/timer.h
index 7aba687..07f1cad 100644
--- a/a8/timer.h
+++ b/a8/timer.h
@@ -38,11 +38,13 @@ namespace a8
                                             list_head* attach_list,
                                             a8::TimerAfterFunc timer_after_func = nullptr);
         //添加固定时间定时器(每天,每次重启一天里可能会多次调用)
-        timer_list* AddFixedTimer(int milli_seconds, a8::XParams param, a8::TimerFunc timer_func);
+        timer_list* AddFixedTimer(int milli_seconds, a8::XParams param, a8::TimerFunc timer_func,
+                                  a8::TimerAfterFunc timer_after_func = nullptr);
         timer_list* AddFixedTimerAndAttach(int milli_seconds,
                                            a8::XParams param,
                                            a8::TimerFunc timer_func,
-                                           list_head* attach_list);
+                                           list_head* attach_list,
+                                           a8::TimerAfterFunc timer_after_func = nullptr);
         //修改定时器参数
         void  ModifyTimer(timer_list* timer, int milli_seconds);
         //删除定时器
diff --git a/a8/xtimer.cc b/a8/xtimer.cc
index 3d7d692..aaca573 100644
--- a/a8/xtimer.cc
+++ b/a8/xtimer.cc
@@ -184,7 +184,8 @@ namespace a8
         return timer;
     }
 
-    xtimer_list* XTimer::AddRepeatTimer(int expire_time, a8::XParams param, a8::XTimerFunc timer_func)
+    xtimer_list* XTimer::AddRepeatTimer(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
+                                        a8::XTimerAfterFunc timer_after_func)
     {
         xtimer_list *timer = NewTimerList();
         InitTimerList(base_,
@@ -194,15 +195,16 @@ namespace a8
                       expire_time,
                       param,
                       timer_func,
-                      nullptr);
+                      timer_after_func);
         ModifyTimer(timer, expire_time);
         return timer;
     }
 
     xtimer_list* XTimer::AddRepeatTimerAndAttach(int expire_time, a8::XParams param, a8::XTimerFunc timer_func,
-                                                 list_head* attach_list)
+                                                 list_head* attach_list,
+                                                 a8::XTimerAfterFunc timer_after_func)
     {
-        xtimer_list* timer = AddRepeatTimer(expire_time, param, timer_func);
+        xtimer_list* timer = AddRepeatTimer(expire_time, param, timer_func, timer_after_func);
         list_add_tail(&timer->attach_entry, attach_list);
         return timer;
     }
@@ -299,9 +301,6 @@ namespace a8
                 if (timer->timer_func) {
                     timer->timer_func(timer->param);
                 }
-                if (timer->timer_after_func) {
-                    timer->timer_after_func(timer->param);
-                }
                 if (base_->running_timer) {
                     switch (timer->timer_type) {
                     case 1:
@@ -320,6 +319,9 @@ namespace a8
                                 list_del_init(&timer->attach_entry);
                             }
                             AddToFreeList(timer);
+                            if (timer->timer_after_func) {
+                                timer->timer_after_func(timer->param);
+                            }
                         }
                         break;
                     }
diff --git a/a8/xtimer.h b/a8/xtimer.h
index e3d0602..c07f380 100644
--- a/a8/xtimer.h
+++ b/a8/xtimer.h
@@ -31,9 +31,11 @@ namespace a8
                                                list_head* attach_list,
                                                a8::XTimerAfterFunc timer_after_func = 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);
+        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);
+                                             list_head* attach_list,
+                                             a8::XTimerAfterFunc timer_after_func = nullptr);
         //修改定时器参数
         void  ModifyTimer(xtimer_list* timer, int expire_time);
         //删除定时器