diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 64a4845..f0081c1 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -1998,6 +1998,8 @@ int Human::SkinLv()
 void Human::CheckSkinTank()
 {
     if (tank_weapon.meta) {
+        float old_rad = self_collider_->rad;
+        self_collider_->rad = tank_weapon.meta->i->rad2();
         std::set<Human*> objects;
         for (auto& grid : grid_list) {
             for (Human* hum: grid->human_list) {
@@ -2012,6 +2014,7 @@ void Human::CheckSkinTank()
         for (Human* hum : objects) {
             hum->BeKill(entity_uniid, name, VW_Tank);
         }
+        self_collider_->rad = old_rad;
     }
 }
 
diff --git a/server/tools/protobuild/metatable.proto b/server/tools/protobuild/metatable.proto
index 7dcfd4f..09aea6b 100755
--- a/server/tools/protobuild/metatable.proto
+++ b/server/tools/protobuild/metatable.proto
@@ -78,6 +78,7 @@ message Equip
     optional float bullet_angle = 34; //子弹浮动方向
     optional string name = 35; //装备名字
     optional float rad = 36; //半径
+    optional float rad2 = 37;
 
     optional string inventory_slot = 31; //库存槽位
     optional int32 _inventory_slot = 32; //库存槽位