Traditional aluminum alloy welding process: large product deformation, slow welding speed and low production efficiency. Due to large welding deformation, subsequent correction work often wastes a lot of time, which increases manufacturing costs and affects production efficiency and production quality. The laser welding machine has high power density, fast speed, low welding heat input, and welding heat. The influence area is small, the welding distortion is small, the weld seam is flat without pores, no or simple processing is required after welding, it can be accurately controlled, the positioning accuracy is high, and automatic laser welding can be realized.