The invention discloses a visible photochromic compound and a synthesis method and application thereof. The structure of the compound contains a spirooxazine group and a photosensitive chromogenic group in conjugated connection with the spirooxazine group. The spirooxazine group and the photosensitive chromogenic group are sensitive to light with different wavelengths, groups at different positions can be excited by irradiation of light with different wavelengths, and charge transfer passing through the entire conjugated molecular structure initiates energy conversion among different group excitation states, so that light absorption of an organic chromophore becomes the key for inducing loop opening of spirooxazine, i.e., the organic chromophore sensitive to visible light can generate a visible photochromic effect. Meanwhile, opening/closing transformation of a photochromic parent substance causes charge concentration and separated circulation in a molecular structure, so that the compound can be endowed with a unique photoelectric conversion property, and even a new property appears. The compound has a potential application prospect in the aspects of data storage, display materials, photoelectric materials, light control of biological and molecular activities, optical computing, anti-counterfeiting and discrimination.