diff --git a/server/gameserver/mapservice.cc b/server/gameserver/mapservice.cc
index c38d1e1..4291aec 100644
--- a/server/gameserver/mapservice.cc
+++ b/server/gameserver/mapservice.cc
@@ -72,7 +72,7 @@ void MapService::UnInit()
 bool MapService::CanAdd(const a8::Vec2& pos, int rad)
 {
     //上
-    if (pos.y + rad + 10 > map_height_) {
+    if (pos.y + rad + 10 > map_height_ * cell_width_) {
         return false;
     }
     //下
@@ -84,7 +84,7 @@ bool MapService::CanAdd(const a8::Vec2& pos, int rad)
         return false;
     }
     //右
-    if (pos.x + rad + 10 > map_width_) {
+    if (pos.x + rad + 10 > map_width_ * cell_width_) {
         return false;
     }
     return true;