Abstract: The manual power switch is often equipped with electrical system of the explosion-proof vehicle in underground mine. The driver needs to operate the power switch when the vehicle is started or turned off. An explosion-proof vehicle power switch controlling automatically is designed for controlling power switch of the vehicle in underground mine, in order to solve a battery defect caused by the collapse of supply in the case of forgetting to turn off the electrical power when the shutdown. The device can reduce the driver operation from the start and stop of the vehicle, but also is of positive significance on the good operation of the vehicle and extending the life of vehicle battery. The design has been applied in a variety of models on the chock carrier, and provides a reference for the design of the control design for the power switch on the new or the modified chock carrier.