diff --git a/server/gameserver/new_hero_agent.cc b/server/gameserver/new_hero_agent.cc
index d0b61a30..65327b56 100644
--- a/server/gameserver/new_hero_agent.cc
+++ b/server/gameserver/new_hero_agent.cc
@@ -333,20 +333,14 @@ behaviac::EBTStatus HeroAgent::CoIdle(int min_val, int max_val)
     }
     auto context = MAKE_BTCONTEXT
         (
-         a8::XTimerWp timer_ptr;
+         int time = 0;
          );
-    context->timer_ptr = owner_->room->xtimer.SetTimeoutWpEx
-        (
-         a8::RandEx(min_val, max_val) / FRAME_RATE_MS,
-         [] (int event, const a8::Args* args)
-         {
-         },
-         &owner_->xtimer_attacher);
+    context->time = a8::RandEx(min_val, max_val);
     auto co = std::make_shared<BtCoroutine>(context, "CoIdle");
     co->runing_cb =
         [this, context] ()
          {
-             if (!context->timer_ptr.expired()) {
+             if (GetRoom()->GetFrameNo() - context->frameno < context->time) {
                  return behaviac::BT_RUNNING;
              } else {
                  return behaviac::BT_SUCCESS;
diff --git a/server/gameserver/new_hero_agent.h b/server/gameserver/new_hero_agent.h
index 6fb8d802..5ee5c9ea 100644
--- a/server/gameserver/new_hero_agent.h
+++ b/server/gameserver/new_hero_agent.h
@@ -9,10 +9,12 @@ class Context : public BtContext \
 {public:                                        \
     __VA_ARGS__;                                \
     std::function<void()> _destory_cb;                                   \
+    long long frameno = 0;                                  \
     ~Context() { if (_destory_cb) { _destory_cb(); };};        \
 };                                              \
 auto context = std::make_shared<Context>(); \
 context->SetOwner(owner);                  \
+context->frameno = owner.Get()->room->GetFrameNo();                  \
 return context;    \
 }(owner_->GetWeakPtrRef(), this)