In order to establish the influence relationship between surface roughness parameters and surface gloss, starting from the measurement method and principle of the latter, the extinction mechanism of rough surface is analyzed in detail, the glossiness calculation method is introduced, and the influence of the coherence length and the mean square deviation of surface height fluctuation on surface gloss is investigated. The results show that the surface gloss decreases rapidly as the mean square deviation of surface height fluctuation increasing in the range less than the wavelength. With the increasing of coherent length and incident angle, the surface gloss increases accordingly. The relevant methods and conclusions are of fundamental significance for the subsequent establishment of the relationship between the gloss and the fine structure characteristics of the surface, so as to achieve the adjustment of the gloss by controlling the fine structure.