Laser cutting has fast speed, high energy density and flexibility. Whether in terms of accuracy, speed or efficiency, it is an excellent choice for the sheet metal cutting industry. As a precision processing method, laser cutting can cut almost all materials, including two-dimensional cutting or three-dimensional cutting of thin metal plates. The laser can be focused into a very small spot, which can be used for micro and precision processing, such as processing of micro slits and micro holes. In addition, there is no need to use tools during processing, which is non-contact processing and has no mechanical processing deformation. For some traditionally difficult-to-cut or low-quality plates, the problems can be easily solved after laser cutting. Especially for the cutting of some carbon steel plates, laser cutting has a huge advantage.