The wagon is mainly composed of car body, bogie, air brake device, hand brake device, coupler cushion device, and etc. The body of the vehicle is all-steel welded structure consisting mainly of base frames, side walls, end walls, roofs and doors; the base frame is welded by middle beam, bottom side beam, bolster beam, large beam, end beam, small beam and floor; the side wall is column structure which is welded by the upper beam, the side columns, side plate, pillow column; the end wall is of plate column type structure, and consists of end plate, end column, corner column and upper end beam.