Laser cutting means the laser emitted from the laser device, focusing into a laser beam with high power density through the optical path system. The laser beam hits the surface of the workpiece, so that the workpiece reaches the melting point or boiling point, while the high-pressure gas with the same shaft of the beam will blow away the melted or gasified material. With the movement of the relative position of beam and workpiece, the material will form the slit, so as to achieve the purpose of cutting. Laser cutting processing uses invisible beam instead of the traditional mechanical cutting tools, with advantages of high precision, fast cutting speed, cutting pattern is not limited, automatic typesetting so as to save materials, smooth incision, low processing cost etc, so it will gradually change or replace the traditional metal cutting processing equipment. There is no contact between the mechanical part of laser head and the workpiece, so it will not cause scratch on the surface of the workpiece at work. The laser cutting speed is fast and the incision is smooth so there is no need for subsequent processing. The cutting heat affected area is small, the material is not easy to deform, the slit is narrow (0.1mm ~ 0.3mm), so the incision has no mechanical stress and shear burrs; High machining accuracy, good repeat ability, no damage to the surface of the material ; Numerical control programming can process any plane graph, can cut a whole large plate with no need to open the mold, so it is economic and saves both time and energy.