Aiming at the problems of traditional waterway regulation design，such as lack of professional auxiliary tools，low production efficiency，difficulty in the division of labor and cooperation，large error in drawing and engineering quantity calculation，difficulty in scheme change，and low level of informatization，we research improvement of the production efficiency and quality of design work. Adopting the method of secondary development of Civil 3D platform with C# language and SAC visualization program，we develop a set of professional software for waterway regulation design，which solves the problems of intelligent mapping calculation，riverbed evolution analysis，BIM + GIS synthesis，etc.，and greatly improves the productivity，optimizes the design process，changes the design focus，and improves the design quality.