High voltage power distribution cabinet (box/box) of new energy electric vehicles is the high voltage and large current distribution unit PDU of all pure electric vehicles and plug-in hybrid vehicles. Centralized power distribution scheme is adopted, with compact structure design, convenient wiring layout and convenient maintenance. According to the system architecture requirements of different customers, the high-voltage distribution box should also integrate some intelligent control management units of the battery management system, thus further simplifying the complexity of power distribution of the vehicle system architecture.