The welding of industrial aluminum profile of vehicle body in high-speed EMUs are usually divided into automatic welding of large parts, small parts and general assembly. Automatic welding of large parts generally refers to automatic welding of roof panels, flat roof panels, floors, roofs and side walls; Automatic welding of small parts generally refers to automatic welding of end walls, the fronts, partition walls, skirt plates and coupler seats. The automatic welding of the general assembly generally refers to the automatic welding of the joints between the side wall and the roof, and the side wall and the underframe. Investing in large-scale key welding equipment is a necessary condition for manufacturing industrial aluminum profile vehicle bodies.In the initial stage of the production of high-speed EMU industrial aluminum profiles, single-wire IGM welding robot were used for automatic welding. With the expansion of EMU production capacity and the adjustment of process layout, single-wire IGM welding robot have been abandoned due to their low production efficiency. Up to now, all large parts of industrial aluminum profile vehicle bodies of high-speed EMU are welded by dual wire IGM welding robot. The wide application of automatic MIG welding technology in the manufacture of high-speed EMU industrial aluminum profile vehicle bodies has greatly improved the level of welding technology and the manufacturing capacity of the production line, thus ensuring the product quality of industrial aluminum profile vehicle bodies of high-speed EMU, has made outstanding contributions to the field of high-speed rail manufacturing.