diff --git a/Boilerplate_!Base/src/lib/Constant.lua b/Boilerplate_!Base/src/lib/Constant.lua
index 6f526cb..6658b4d 100644
--- a/Boilerplate_!Base/src/lib/Constant.lua
+++ b/Boilerplate_!Base/src/lib/Constant.lua
@@ -535,6 +535,18 @@ local CONSTANT = {
 	ROGUELIKE_MAP = {
 		[995] = true, -- 八荒衡鉴
 	},
+	CITY_MAP = {
+		[  6] = true, -- 扬州
+		[  8] = true, -- 洛阳
+		[ 15] = true, -- 长安
+		[108] = true, -- 成都
+		[151] = true, -- 洛阳·战乱
+		[156] = true, -- 长安·战乱
+		[172] = true, -- 长安城
+		[194] = true, -- 太原
+		[239] = true, -- 洛阳城
+		[332] = true, -- 侠客岛
+	},
 	STRONGHOLD_MAP = {
 		[  9] = true, -- 洛道
 		[ 13] = true, -- 金水镇
diff --git a/Boilerplate_!Base/src/lib/Game.Map.lua b/Boilerplate_!Base/src/lib/Game.Map.lua
index f568b26..81c1b4e 100644
--- a/Boilerplate_!Base/src/lib/Game.Map.lua
+++ b/Boilerplate_!Base/src/lib/Game.Map.lua
@@ -186,9 +186,17 @@ end
 ---判断一个地图是不是主城地图
 ---@param dwMapID number @要判断的地图ID
 ---@return boolean @是否是主城地图
+do
+local CITY_MAP = X.CONSTANT.CITY_MAP or {}
 function X.IsCityMap(dwMapID)
-	local tType = Table_GetMapType(dwMapID)
-	return tType and tType.CITY and true or false
+	if CITY_MAP[dwMapID] ~= nil then
+		return CITY_MAP[dwMapID]
+	else
+		local tType = Table_GetMapType(dwMapID)
+		CITY_MAP[dwMapID] = tType and tType.CITY and true or false
+		return CITY_MAP[dwMapID]
+	end
+end
 end
 
 ---判断当前地图是不是主城地图