The wagon is a set of two cars each, and the two cars are connected by drag rod. The wagon is mainly composed of car body, bogie, air brake device, hand brake device, traction buffer device, and etc. The body of the vehicle is an all-steel welded structure consisting mainly of base frames, side walls and end walls; the base frame is welded by middle beam, bolster beam, large beam, end beam, small beam and steel floor; the side wall is column structure which is welded by the upper beam, the side columns, the lateral cross belt, the inner reinforcing seat, the hoarding and the pressure plate;