The skin reconstruction system of C02 fractional laser, emits a laser with a wavelength of 10600nm, which produces a certain amount of thermal exfoliation at the site where the focal spot directly penetrates, more thermal coagulation and obvious thermal effects. At this time, thermal bridging between the normal tissues after the trauma occurs. Start the skin would repair mechanism validation phase to regenerate a large amount of collagen to achieve the reconstruction of the dermal framework structure, the facial contours are carved, the wrinkles disappear, the skin texture is fine, and the acne scars are smoothed.