Whole vehicle power supply control circuit of new energy commercial vehicle and working method of whole vehicle power supply control circuit

The invention belongs to the field of automobile body electric control, and provides a new energy commercial vehicle whole vehicle power supply control circuit and a working method thereof.The new energy commercial vehicle whole vehicle power supply control circuit comprises a storage battery and a mechanical power-off switch, and the negative electrode of the storage battery is connected with the negative electrode of a control relay through the mechanical power-off switch; the positive electrode of the storage battery is connected with a fuse box power signal pin and a vehicle body controller power signal pin. A normalizing signal pin of the automobile body controller is connected with the control relay; a negative electrode signal pin of the automobile body controller is connected with a normally open signal pin of the control relay; after the new energy commercial vehicle is folded, a mechanical power-off switch does not need to be turned off, the vehicle can be directly locked for people to walk, after t