Among them, laser fading freckle is an excellent choice. At present, the more effective freckle removal technology is laser freckle removal. Aiming at this technology, through photochemical action, the specific broad spectrum of laser is applied to deep pigments and pigments with large molecules, and the stubborn pigments are accurately exploded into tiny pigment molecules by using the instantaneous high energy of laser, thus removing deep spots and achieving the purpose of freckle removal and whitening.