diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 626300c..2db0cfa 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -21,7 +21,7 @@ Bullet::~Bullet()
 
 void Bullet::Initialize()
 {
-    Entity::Initialize();
+    MoveableEntity::Initialize();
     RecalcSelfCollider();
 }
 
diff --git a/server/gameserver/entity.h b/server/gameserver/entity.h
index ccb5c9d..1a05728 100644
--- a/server/gameserver/entity.h
+++ b/server/gameserver/entity.h
@@ -31,7 +31,6 @@ class Entity
     Entity();
     virtual ~Entity();
     virtual void Initialize();
-    virtual void Update(int delta_time) {};
     virtual void FillMFObjectPart(Room* room, cs::MFObjectPart* part_data) {};
     virtual void FillMFObjectFull(Room* room, cs::MFObjectFull* full_data) {};
     virtual float GetSpeed() { return 1.0f;};
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index e89043f..14035e5 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -68,7 +68,7 @@ Human::~Human()
 
 void Human::Initialize()
 {
-    Entity::Initialize();
+    MoveableEntity::Initialize();
     skill_xtimer_attacher_.xtimer = &room->xtimer;
     RecalcSelfCollider();
     volume_ = meta->volume;
diff --git a/server/gameserver/loot.cc b/server/gameserver/loot.cc
index c57ef01..1d0ce18 100644
--- a/server/gameserver/loot.cc
+++ b/server/gameserver/loot.cc
@@ -21,7 +21,7 @@ Loot::~Loot()
 
 void Loot::Initialize()
 {
-    Entity::Initialize();
+    RoomEntity::Initialize();
     RecalcSelfCollider();
 }
 
diff --git a/server/gameserver/moveableentity.h b/server/gameserver/moveableentity.h
index b6562c5..b464332 100644
--- a/server/gameserver/moveableentity.h
+++ b/server/gameserver/moveableentity.h
@@ -6,5 +6,5 @@ class MoveableEntity : public RoomEntity
 {
  public:
     int updated_times = 0;
-
+    virtual void Update(int delta_time) {};
 };
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index 40aa8b1..fe9a918 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -27,7 +27,7 @@ class Obstacle : public Entity
     Obstacle();
     virtual ~Obstacle() override;
     virtual void Initialize() override;
-    void RecalcSelfCollider();
+    virtual void RecalcSelfCollider();
     virtual void FillMFObjectPart(Room* room, cs::MFObjectPart* part_data) override;
     virtual void FillMFObjectFull(Room* room, cs::MFObjectFull* full_data) override;
     virtual void GetAabbBox(AabbCollider& aabb_box) override;
@@ -49,7 +49,7 @@ class Obstacle : public Entity
     void SetHealth(Room* room, float value);
     void Die(Room* room);
 
-private:
+protected:
     CircleCollider* self_collider_ = nullptr;
     AabbCollider* self_collider2_ = nullptr;
 
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 49214b4..6e97b4e 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -16,6 +16,7 @@
 #include "bullet.h"
 #include "collider.h"
 #include "obstacle.h"
+#include "roomobstacle.h"
 #include "building.h"
 #include "loot.h"
 #include "roommgr.h"
@@ -367,12 +368,12 @@ void Room::DropItem(a8::Vec2 pos, int item_id, int item_count, int item_lv)
     }
 }
 
-Obstacle* Room::CreateObstacle(int id, float x, float y)
+RoomObstacle* Room::CreateObstacle(int id, float x, float y)
 {
-    Obstacle* entity = InternalCreateObstacle(id, x, y,
-                                              [] (Obstacle*)
-                                              {
-                                              });
+    RoomObstacle* entity = InternalCreateObstacle(id, x, y,
+                                                  [] (Obstacle*)
+                                                  {
+                                                  });
     assert(entity);
     if (entity) {
         entity->BroadcastFullState(this);
@@ -1159,13 +1160,14 @@ void Room::AirDrop(int appear_time, int box_id)
     }
 }
 
-Obstacle* Room::InternalCreateObstacle(int id, float x, float y,
-                                       std::function<void (Obstacle*)> on_precreate)
+RoomObstacle* Room::InternalCreateObstacle(int id, float x, float y,
+                                           std::function<void (Obstacle*)> on_precreate)
 {
     MetaData::MapThing* thing = MetaMgr::Instance()->GetMapThing(id);
     if (thing) {
-        Obstacle* entity = new Obstacle();
+        RoomObstacle* entity = new RoomObstacle();
         entity->meta = thing;
+        entity->room = this;
         entity->entity_uniid = AllocUniid();
         entity->SetPos(a8::Vec2(x, y));
         entity->Initialize();
diff --git a/server/gameserver/room.h b/server/gameserver/room.h
index 1a0beec..719474c 100644
--- a/server/gameserver/room.h
+++ b/server/gameserver/room.h
@@ -28,6 +28,7 @@ class Entity;
 class RoomEntity;
 class MoveableEntity;
 class Obstacle;
+class RoomObstacle;
 class Bullet;
 class Human;
 class Player;
@@ -128,9 +129,9 @@ private:
     void AirDrop(int appear_time, int box_id);
     void ShuaPlane();
     int NewTeam();
-    Obstacle* CreateObstacle(int id, float x, float y);
-    Obstacle* InternalCreateObstacle(int id, float x, float y,
-                                     std::function<void (Obstacle*)> on_precreate);
+    RoomObstacle* CreateObstacle(int id, float x, float y);
+    RoomObstacle* InternalCreateObstacle(int id, float x, float y,
+                                         std::function<void (Obstacle*)> on_precreate);
     void AddObjectLater(RoomEntity* entity);
     void OnGameOver();
     void RandRemoveAndroid();
diff --git a/server/gameserver/roomentity.cc b/server/gameserver/roomentity.cc
index e69de29..723205e 100644
--- a/server/gameserver/roomentity.cc
+++ b/server/gameserver/roomentity.cc
@@ -0,0 +1,10 @@
+#include "precompile.h"
+
+#include "roomentity.h"
+#include "room.h"
+
+void RoomEntity::Initialize()
+{
+    Entity::Initialize();
+    xtimer_attacher.xtimer = &room->xtimer;
+}
diff --git a/server/gameserver/roomentity.h b/server/gameserver/roomentity.h
index 897e860..980a7be 100644
--- a/server/gameserver/roomentity.h
+++ b/server/gameserver/roomentity.h
@@ -8,4 +8,5 @@ class RoomEntity : public Entity
     Room* room = nullptr;
     a8::XTimerAttacher xtimer_attacher;
 
+    virtual void Initialize() override;
 };
diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
new file mode 100644
index 0000000..b54c630
--- /dev/null
+++ b/server/gameserver/roomobstacle.cc
@@ -0,0 +1,60 @@
+#include "precompile.h"
+
+#include "metamgr.h"
+#include "room.h"
+#include "collider.h"
+#include "building.h"
+#include "human.h"
+#include "app.h"
+#include "typeconvert.h"
+#include "bullet.h"
+#include "mapservice.h"
+#include "roomobstacle.h"
+
+RoomObstacle::RoomObstacle():Obstacle()
+{
+
+}
+
+RoomObstacle::~RoomObstacle()
+{
+
+}
+
+void RoomObstacle::Initialize()
+{
+    Obstacle::Initialize();
+    xtimer_attacher.xtimer = &room->xtimer;
+}
+
+void RoomObstacle::RecalcSelfCollider()
+{
+    if (meta->i->attack_type() != 2){
+        switch (meta->i->type()) {
+        case 1:
+            {
+                if (!self_collider_) {
+                    self_collider_ = new CircleCollider();
+                    self_collider_->owner = this;
+                    AddCollider(self_collider_);
+                }
+                self_collider_->pos = a8::Vec2();
+                self_collider_->rad = meta->i->height() / 2.0;
+                permanent_map_service->AddCollider(self_collider_);
+            }
+            break;
+        case 2:
+            {
+                if (!self_collider2_) {
+                    self_collider2_ = new AabbCollider();
+                    self_collider2_->owner = this;
+                    AddCollider(self_collider2_);
+                }
+                self_collider2_->_min = a8::Vec2(meta->i->width() / -2.0f, meta->i->height() / -2.0f);
+                self_collider2_->_max = a8::Vec2(meta->i->width() / 2.0f, meta->i->height() / 2.0f);
+                permanent_map_service->AddCollider(self_collider2_);
+            }
+            break;
+        }
+    }
+}
diff --git a/server/gameserver/roomobstacle.h b/server/gameserver/roomobstacle.h
new file mode 100644
index 0000000..25bf704
--- /dev/null
+++ b/server/gameserver/roomobstacle.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "obstacle.h"
+
+class RoomObstacle : public Obstacle
+{
+ public:
+    Room* room = nullptr;
+    a8::XTimerAttacher xtimer_attacher;
+
+    RoomObstacle();
+    virtual ~RoomObstacle() override;
+    virtual void Initialize() override;
+    virtual void RecalcSelfCollider() override;
+
+};