The utility model provides a car pushing device. The car pushing device comprises a first winch, a second winch, a car pusher, guide rails, a first pulley, a second pulley, a third pulley and a remote control system. The guide rails are arranged between two tracks of a roadway section in parallel. The length of the guide rails is smaller than the length of the tracks of the roadway section. The car pusher is arranged in the guide rails in a sliding mode. One end of the car pusher is connected with one end of a steel wire rope of the second winch through the first pulley. The other end of the car pusher is connected with the other end of the steel wire rope through the second pulley and the third pulley. The first pulley and the second pulley are arranged on one side of the car pusher. The third pulley is arranged on the other side of the car pusher. The second winch is arranged on one side of tracks where a mine car runs, controls the car pusher to push the mine car to slide in the roadway section and controls the sliding speed. One end of the car pusher and the first winch are connected with the mine car. The remote control system controls start or stop of the first winch and start of the second winch. By means of the car pushing device, safety of operators is ensured.