Lightweight power battery box and use method thereof

The invention belongs to the technical field of power battery box bodies, and particularly relates to a lightweight power battery box body and a use method thereof.The battery box body comprises a lightweight bottom plate, the top ends of the two long edges of the lightweight bottom plate are detachably connected with vertically-arranged lightweight long side plates, and the top ends of the two short edges of the lightweight bottom plate are provided with vertically-arranged lightweight short side plates; the light short side plates are detachably connected with the light long side plates, the top ends of the light long side plates and the top ends of the light short side plates are jointly and detachably connected with light cover plates, the outer side walls of the light long side plates are detachably connected with a plurality of fixing parts, the inner side walls of the light long side plates are provided with elastic vibration reduction parts, and the elastic vibration reduction parts are detachably con