In laser marking, a high-energy laser beam is used to melt or even vaporize the material instantaneously, accompanied by vibration, impact and other effects, and assisted by high-pressure air to blow off slag. With the relative high-speed movement of the beam and the material, a groove with a certain depth is formed on the surface of the material. There is little heat influence on the groove edge, no stacked metal, and basically no workpiece deformation.