diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 049155c..f1bd28e 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -1824,6 +1824,18 @@ void Human::_UpdateMove(int speed)
     #endif
 }
 
+void Human::ChangeToRace(RaceType_e race, int level)
+{
+    if (race != kHumanRace ||
+        race != kZombieRace) {
+        abort();
+    }
+    race_ = race;
+    level_ = level;
+    room->frame_event.AddRaceChg(this);
+    room->frame_event.AddLevelChg(this);
+}
+
 void Human::_InternalUpdateMove(float speed)
 {
     float nx = move_dir.x * speed;
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index 131db8b..314c61f 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -280,6 +280,7 @@ class Human : public MoveableEntity
     ObjectSyncFlags* GetObjectSyncFlags(int obj_uniid);
     void _UpdateMove(int speed);
     RaceType_e GetRace() { return race_; }
+    void ChangeToRace(RaceType_e race, int level);
 
 protected:
     void _InternalUpdateMove(float speed);
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 4ab51e9..bf0983a 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -1780,6 +1780,9 @@ void Room::NotifyGameStart()
     if (room_type_ == RT_NewBrid || room_type_ == RT_MidBrid) {
         NewBieRoomStart();
     }
+    if (GetRoomMode() == kZombieMode) {
+        ZombieModeStart();
+    }
     InitAndroidAI();
 }
 
@@ -2644,6 +2647,24 @@ void Room::NewBieRoomStart()
     }
 }
 
+void Room::ZombieModeStart()
+{
+    if (GetRoomMode() != kZombieMode) {
+        if (human_hash_.size() != GetRoomMaxPlayerNum()) {
+            abort();
+        }
+        std::vector<Human*> human_list;
+        for (auto& pair : human_hash_) {
+            human_list.push_back(pair.second);
+        }
+        std::random_shuffle(human_list.begin(), human_list.end());
+        for (size_t i = 0; i < 2; ++i) {
+            Human* hum = human_list[i];
+            hum->ChangeToRace(kZombieRace, 1);
+        }
+    }
+}
+
 Human* Room::GetOneCanEnableAndroid()
 {
     std::vector<Human*> humans;
diff --git a/server/gameserver/room.h b/server/gameserver/room.h
index 030875f..d952bd3 100644
--- a/server/gameserver/room.h
+++ b/server/gameserver/room.h
@@ -195,6 +195,7 @@ private:
     void CombineTeamBornPoint();
     void ForceSetBornPoint(Human* hum, BornPoint* born_point);
     void NewBieRoomStart();
+    void ZombieModeStart();
     void CreateLevel0RoomSpecThings();
     bool CanAddToScene(Human* hum);
     void SyncFrameData();