The robot six-axis laser welding machine is a kind of laser welding device that couples a high-energy laser beam into an optical fiber and transmits it through a collimator lens after being transmitted over a long distance. For parts where welding is difficult to access, a simple universal instrument can be used to butt joints with large molds and inaccessible precision parts, and flexible transmission non-contact welding is used to provide greater flexibility. The laser beam can realize the time and energy splitting, and it can process multiple beams at the same time, which provides the conditions for more precise welding.