diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index ad929185..c184a6c6 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -4035,5 +4035,14 @@ void Room::ClearPostBattleAutoFreeList()
 
 void Room::OnBattleStart()
 {
-
+    std::vector<EntityWeakPtr> entitys;
+    entitys.reserve(uniid_hash_.size());
+    for (auto& pair : uniid_hash_) {
+        entitys.push_back(pair.second->GetEntityWeakPtrRef());
+    }
+    for (auto& e : entitys) {
+        if (e.Get()) {
+            e.Get()->OnBattleStart(this);
+        }
+    }
 }