Laser-integrated hand-held laser welding machine, replaces the previous fixed optical path with a hand-held welding gun, hand-held welding, flexible and convenient, longer welding distance, overcomes the limitation of workbench space, and cannot be automatically welded when the workpiece size is not uniform use. Mainly for large workpieces, fixed positions such as inner right angle, outer right angle, plane weld welding, small heat affected area during welding, small deformation, large welding d