DC reversing contactor is a switching appliance suitable for remote manipulation (closing, opening or switching) of high-power electrical appliances. The contactor is used in electric vehicles, and the coil consumes a large amount of power, which is generally used for intermittent duty. DC contactors are mainly used for making and breaking DC circuits at a long distance and frequently starting, stopping, reversing and reversing braking DC motors, and also for frequently connecting and disconnecting lifting electromagnets, solenoid valves, clutches electromagnetic coils, etc.