The invention provides a car push device which comprises a first winch, a second winch, a car push device, guide rails, a first pulley, a second pulley, a third pulley and a remote control system. The guide rails are arranged between two rails of a level section in parallel. The length of the guide rails is smaller than that of the rails of the level section. The car push device is arranged in the guide rails in a sliding mode. One end of the car push device is connected with one end of a steel wire rope of the second winch through the first pulley and the other end of the car push device 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 push device. The third pulley is arranged on the other side of the car push device. The second winch is arranged on one side of the rails where a tramcar runs and the car push device is controlled to push the tramcar to slide on the level section at the sliding speed. One end of the car push device and the first winch are connected with the tramcar. The remote control system controls the first winch to start or stop and controls the second winch to start. By the adoption of the car push device, operator safety is guaranteed.