The coarse particles theory, the fine particles theory and the bridge theory w ere used to calculate the absorption and scattering coefficients of the particle s separately according to their size compared with the light wavelength. The dif fuse reflectivity of the coating with the particles was obtained. The influences of the various parameters of the coating, such as the optical constants of the particles and the binder, the size and the volume fraction of the particles, on the diffuse reflectivity were discussed. Taking TiO2 as the example, the compu ter design method of visible light stealth coating is introduced.