Laser is more and more widely used in the field of beauty. Laser produces monochromatic light with high energy, accurate focus and certain penetrating power, which acts on human tissues to produce high fever, thus cutting or destroying target tissues. Pulsed laser with different wavelengths can treat various vascular dermatoses and pigmentation, such as nevus OTA, nevus flammeus, freckles, senile plaque, telangiectasia, tattoo removal, eyeliner washing, eyebrow washing and scar treatment. Some new laser instruments, such as high-energy ultra-pulse CO2 laser and erbium laser, have achieved good results in wrinkle removal, skin peeling and skin replacement, snoring treatment and tooth whitening, which has opened up more and more extensive fields for laser surgery.