The fiber laser cutting is more precise, the focusing focus can reach 25um, the heat affected zone is small, the cutting gap is small, and the workpiece deformation is small. As a flexible processing method, the fiber laser can be combined with an automatic control system to achieve automatic tracking, automatic edge detection, and automatic nesting, which greatly improves production efficiency. It is widely used in metal sheet cutting, has better performance, and can better meet fine Cutting requirements. At present, in the application of metal sheet cutting, fiber lasers have replaced a considerable part of CO2 lasers and YAG solid-state lasers. The development of high-power fiber lasers in the future will accelerate this substitution trend.