With the laser more and more widely used in various fields, the handheld laser welding system came into being. The high-power fiber laser welding machine is equipped with convenient welding gun, so that it has the characteristics of simple operation, flexible and convenient, and can be used in thin stainless steel plate, iron plate, galvanized plate and other metal materials, especially suitable for complex and irregular welding process, can perfectly replace the traditional argon arc welding, electric welding and other processes.