Three-dimensional non-woven is a new kind of filling material which has unique tridimensional structure and excellent properties. It will be gradually applied in the field of bra cups instead of polyurethane foam. In this paper, three-dimensional non-woven and its matching materials are firstly molded into bra cups using a contour molding machine under different molding conditions. Secondly, the performance of these molded cups is analyzed in detail from the aspect of formability, handle and appearance. The performance of three-dimensional non-woven after molding is analyzed in detail from microstructure. Finally, the molding mechanism of three-dimensional non-woven bra cup has been found by researching the relationship between filling material microstructures and molded cup properties. The study provides the bra industry with a valuable basis for molding production of three-dimensional non-woven bra cups.