The working mode of the handheld fiber laser welding machine, hand-held welding, is flexible and convenient, and the welding distance is longer. Replace traditional arc welding with handheld welding. It is mainly used for laser welding of long-distance and large workpieces. The heat-affected area during welding is small and will not cause work deformation, blackening, or traces on the back. The welding depth is large, the welding is firm, and the melting is sufficient.