Laser welding machine is to use high energy laser pulse to heat the material locally in a small area. The energy radiated by laser is diffused through the heat transfer guide material, and the material is melted to form a specific melting pool. It is a new welding method, mainly for thin-walled materials and precision parts welding, which can realize spot welding, butt welding, overlapping welding, sealing welding, etc., with high depth to width ratio, small weld width, small heat affected area, small deformation, fast welding speed, smooth and beautiful weld, no treatment or simple treatment after welding, high quality of weld, no porosity, accurate control, The focus light point is small, the positioning accuracy is high, and it is easy to realize automation.