diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 6017fa8..990c2a9 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -1,5 +1,7 @@
 #include "precompile.h"
 
+#include <math.h>
+
 #include "obstacle.h"
 #include "metamgr.h"
 #include "room.h"
@@ -155,6 +157,11 @@ void Obstacle::FillMFObjectFull(Room* room, Human* hum, cs::MFObjectFull* full_d
     p->set_dead(IsDead(room));
     p->set_dead_at_thisframe(IsDead(room) ? GetDeadFrameNo(room) <= room->GetFrameNo() : false);
 
+    if (!IsPermanent()) {
+        RoomObstacle* ob = (RoomObstacle*)this;
+        p->set_born_frameno(ceil(ob->born_frameno / 2.0));
+    }
+
     p->set_is_door(is_door_);
     if (is_door_ && IsPermanent()) {
         ObstacleData* data = room->GetPermanentObstacleData(GetUniId());
diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
index a181018..cee3da9 100644
--- a/server/gameserver/roomobstacle.cc
+++ b/server/gameserver/roomobstacle.cc
@@ -58,6 +58,7 @@ void RoomObstacle::Initialize()
     if (meta->sweep_tags != 0) {
         room->mine_objects[GetUniId()] = GetWeakPtrRef();
     }
+    born_frameno = room->GetFrameNo();
 }
 
 void RoomObstacle::RecalcSelfCollider()
diff --git a/server/gameserver/roomobstacle.h b/server/gameserver/roomobstacle.h
index ad658c8..afd4b79 100644
--- a/server/gameserver/roomobstacle.h
+++ b/server/gameserver/roomobstacle.h
@@ -22,6 +22,7 @@ class RoomObstacle : public Obstacle
     std::shared_ptr<Ability> context_ability;
     bool sweep_lock = false;
     MetaData::Buff* buff_meta = nullptr;
+    long long born_frameno = 0;
 
     virtual ~RoomObstacle() override;
     virtual void Initialize() override;
diff --git a/server/tools/protobuild/cs_proto.proto b/server/tools/protobuild/cs_proto.proto
index b89357e..6f682d9 100755
--- a/server/tools/protobuild/cs_proto.proto
+++ b/server/tools/protobuild/cs_proto.proto
@@ -293,6 +293,8 @@ message MFObstacleFull
     optional int32 obj_uniid = 1; //唯一id
     optional MFVec2 pos = 2; //位置
     optional float scale = 3; //缩放比
+    //出生帧号 born_frameno == SMUpdate.frmanoe时表示在当前这帧出生(可能出现为0的情况比如静态物件)
+    optional int32 born_frameno = 4 [default = 0];
 
     optional int32 obstacle_id = 6; //阻挡物id
     optional float health = 7; //血量