Automatic laser welding machine uses high-energy laser pulse to locally heat the material in a small area. The energy of laser radiation is guided by heat transfer to the internal diffusion of the material, and the material is melted to form a specific molten pool.It is a new welding method, mainly for the welding of thin-walled materials and precision parts, and can realize spot welding, butt welding, overlap welding, seal welding, etc.High depth width ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth and beautiful weld, no treatment or simple treatment after welding. The welding seam has high quality, no pores, can be accurately controlled, the focus light spot is small, the positioning accuracy is high, and it is easy to realize automation.