YAG laser machine is a solid laser machine with infrared light whose wavelength of frequency band is 1.064um.It uses krypton lamp as energy source(driving source).YAG can send out special wavelength to let effective substance's level of energy jump higher so that it can let off laser.After the energy of laser is strengthened it will form a laser beam to process the material. The path of the laser beam will be changed through the resonance mirror controlled by computer so as to accomplish automatic marking.It has marking high speeds, clear printing, handle conveniently, and can achieve craftwork that some routine ways connot come true.