A laser cutting machine is a laser device that forms a contour cutting gap on a cloth surface by a computer-controlled high-energy laser beam. The laser from the laser is focused into a high power density laser beam by a special optical path system. When the laser beam is irradiated onto the surface of the cloth, the contact point of the cloth instantaneously reaches the melting point and evaporates, and the laser head is controlled by the computer. When the relative position of the laser head and the cloth is moved, the cloth finally forms a contour cut for the purpose of cutting. The laser cutting machine has the characteristics of high precision, high speed, flexible cutting pattern setting, automatic typesetting, flat cutting and low processing cost.