高层建筑有大面积的地下室，若能在战时快速转换为人员掩蔽所，显然具有十分重要的意义。本文对高层建筑地下室进行了风载、地震荷载和防护荷载作用下承载力安全度比较。并结合上海市某大厦地下车库进行主体结构和出入口的战时人防功能转换。 High-rise buildings have a large area of ​​basement. It is obviously of great significance if they can quickly convert to shelters for personnel during the war. This paper compares the bearing capacity of the high-rise building basement under the loads of wind load, earthquake load and protection load. Combined with the underground parking garage of a certain building in Shanghai, the mainframe structure and the entrance and exit of the wartime air defense function were transformed.