1, the use of laser in the cosmetic world is becoming more and more widespread laser is through the generation of high-energy, precisely focused, with a certain penetrating monochromatic light, acting on human tissue and generate high local heat to achieve the purpose of removing or destroying the target tissue 2, laser surgery has the superiority of traditional surgery incomparable First of all, laser surgery does not require hospitalization, small surgical incision, no bleeding during surgery, light trauma, no scarring. 3.The effectiveness of laser in the treatment of vascular skin diseases. The use of pulsed dye laser in the treatment of erythema nodosum has remarkable efficacy, little damage to the surrounding tissues and almost no scarring. Its appearance has become a revolution in the history of treatment of nevus of bright redness, because in the history of treatment of nevus of bright redness, methods such as radiation, freezing, electrocautery and surgery have high incidence of scarring and often pigment loss or deposition. Laser treatment of capillary dilation is also efficacious. In addition, due to variable pulse lasers and other successive introduction, making unsatisfactory tattoo removal, as well as various pigmented skin diseases such as nevus of Ota, age spots and other treatment has been a major breakthrough. 4, laser surgery has opened up a new era of medical aesthetics High-energy ultra-pulse CO2 laser resurfacing has pioneered a new technology in cosmetic surgery. Laser skin resurfacing not only overcomes the shortcomings of traditional methods such as easy bleeding and depth control, but also has the effect of stimulating skin elastic fibers and making them contract. The contraction of elastic fibers can tighten the skin, further promoting the disappearance of superficial wrinkles and making wrinkle removal more effective. In addition, many advanced lasers for eye bags, snoring, and even laser teeth whitening have created one miracle after another in the medical aesthetic world with their safe and precise efficacy, easy and quick treatment. Laser cosmetology has made a big step forward and given a new connotation to medical cosmetology.