Via the analysis of the feature and the modeling characteristics of fading surface, according to fading surface line and changing feature of the surface, the fading surface can be categorized as curve fading, surface fading and fillet fading. This paper puts forward the available modeling philosophy suitable for all kinds of fading surfaces, makes the modeling test for all kinds of fading surfaces by combining generative shape design mode and freestyle shape mode under CATIA, and expounds its construction philosophy practice, surface modeling skills and fading surface evaluation method, which provide reference for the curve design of industrial products under CATIA environment.