The laser cutting machine uses the laser beam emitted from the laser generator to focus on the laser beam irradiation condition of high power density through the optical path system. The laser heat is absorbed by the workpiece material and the temperature of the workpiece rises sharply. After reaching the boiling point, the material begins to vaporize and form Holes, accompanied by high-pressure airflow, move the relative position of the beam and the workpiece, and finally form a slit in the material. The technological parameters (cutting speed, laser power, gas pressure, etc.) and movement trajectory during slitting are controlled by the CNC system, and the slag at the slit is blown off by the auxiliary gas with a certain pressure.