The laser engraving and cutting machine uses a focused high-power density laser beam to irradiate the workpiece to rapidly melt, vaporize, ablate or reach the ignition point of the irradiated material, and then use the coaxial high-pressure gas or the generated metal vapor pressure to melt the material. Blow off, with the relative linear movement of the beam and the material, the hole is continuously formed into a very narrow slit, thus completing the cutting