diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index a7e4a5ed..12a35a7e 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -2704,6 +2704,9 @@ Hero* Creature::InternalSummonHero(Buff* buff, MetaData::Player* hero_meta, a8::
                  born_pos.x,
                  born_pos.y
                  );
+            if (obstacle) {
+                obstacle->DestoryAt(std::get<1>(tuple));
+            }
             delay_time += std::get<1>(tuple);
         }
         SummonHeroInfo* summon_info = new SummonHeroInfo;
diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
index 17a3dcfb..c577a3eb 100644
--- a/server/gameserver/roomobstacle.cc
+++ b/server/gameserver/roomobstacle.cc
@@ -743,3 +743,23 @@ void RoomObstacle::InstallPreExplostionSummonTimer()
         }
     }
 }
+
+void RoomObstacle::DestoryAt(int time)
+{
+    room->xtimer.AddDeadLineTimerAndAttach
+        (
+         time / FRAME_RATE_MS,
+         a8::XParams()
+         .SetSender(this),
+         [] (const a8::XParams& param)
+         {
+             RoomObstacle* obstacle = (RoomObstacle*)param.sender.GetUserData();
+             obstacle->DetachFromMaster();
+#ifdef DEBUG
+             obstacle->room->BroadcastDebugMsg
+                 (a8::Format("obstacle destory %d", {obstacle->meta->i->thing_id()}));
+#endif
+         },
+         &xtimer_attacher.timer_list_
+         );
+}
diff --git a/server/gameserver/roomobstacle.h b/server/gameserver/roomobstacle.h
index 3553d553..786c890e 100644
--- a/server/gameserver/roomobstacle.h
+++ b/server/gameserver/roomobstacle.h
@@ -40,6 +40,7 @@ class RoomObstacle : public Obstacle
     RoomObstacleWeakPtr& GetWeakPtrRef();
     void Destory();
     void PushCollisionObjects();
+    void DestoryAt(int time);
 
 private:
     void SpecExplosion();