diff --git a/server/gameserver/boxdrop.cc b/server/gameserver/boxdrop.cc
index 3ec5aa23..12e0809b 100644
--- a/server/gameserver/boxdrop.cc
+++ b/server/gameserver/boxdrop.cc
@@ -37,15 +37,17 @@ void BoxDrop::UnInit()
 
 void BoxDrop::OnHeroDeadDrop(Hero* hero)
 {
-    if (GetRemainNum() > 0) {
-        Drop(1, hero->GetPos().ToGlmVec3());
+    int box_num = GetAndDecObjBoxNum(hero->GetUniId());
+    if (box_num > 0) {
+        Drop(box_num, hero->GetPos().ToGlmVec3());
     }
 }
 
 void BoxDrop::OnObstacleDeadDrop(Obstacle* ob)
 {
-    if (GetRemainNum() > 0) {
-        Drop(1, ob->GetPos().ToGlmVec3());
+    int box_num = GetAndDecObjBoxNum(ob->GetUniId());
+    if (box_num > 0) {
+        Drop(box_num, ob->GetPos().ToGlmVec3());
     }
 }
 
@@ -152,7 +154,7 @@ void BoxDrop::RequestReturnBoxNum()
         url_params->SetVal("a", "requestReturnBoxNum");
         url_params->SetVal("account_id", account_id);
         url_params->SetVal("session_id", session_id);
-        url_params->SetVal("used_num", used_num_);
+        url_params->SetVal("used_num", GetUsedBoxNum());
         url_params->SetVal("alloc_box_num", alloc_box_num_);
         HttpProxy::Instance()->HttpGet
             (
@@ -184,11 +186,6 @@ void BoxDrop::RequestReturnBoxNum()
     }
 }
 
-int BoxDrop::GetRemainNum()
-{
-    return std::max(0, alloc_box_num_ - used_num_);
-}
-
 bool BoxDrop::FillAccountIdSessionId(std::string account_id, std::string session_id)
 {
     bool ok = false;
@@ -269,4 +266,25 @@ void BoxDrop::AllocBoxToRoom()
              box_list.size()
          });
 #endif
+    for (int i = 0; i < alloc_box_num_; ++i) {
+        if (drop_hash_.size() < all_list.size()) {
+            drop_hash_[all_list.at(i)->GetUniId()] = 1;
+        }
+    }
+}
+
+int BoxDrop::GetAndDecObjBoxNum(int uniid)
+{
+    auto itr = drop_hash_.find(uniid);
+    if (itr != drop_hash_.end()) {
+        int num = itr->second;
+        itr->second = 0;
+        return num;
+    }
+    return 0;
+}
+
+int BoxDrop::GetUsedBoxNum()
+{
+    return 0;
 }
diff --git a/server/gameserver/boxdrop.h b/server/gameserver/boxdrop.h
index 91707367..8a5b4986 100644
--- a/server/gameserver/boxdrop.h
+++ b/server/gameserver/boxdrop.h
@@ -20,16 +20,16 @@ class BoxDrop : public std::enable_shared_from_this<BoxDrop>
 
     void Drop(int num, const glm::vec3& center);
     void RequestAllocBoxNum();
-    int GetRemainNum();
     bool FillAccountIdSessionId(std::string account_id, std::string session_id);
     void OnAllocOk(int box_num);
     void OnAllocFail();
     void AllocBoxToRoom();
+    int GetAndDecObjBoxNum(int uniid);
+    int GetUsedBoxNum();
 
  private:
     Room* room_ = nullptr;
     a8::XTimerWp get_box_num_timer_;
-    int used_num_ = 0;
     int alloc_box_num_ = 0;
     bool alloced_ = false;
     bool returned_ = false;