In recent years, many countries apply BIM in large projects one after another. The industry has recognized the role of BIM in AEC field. BIM has become the new tendency in AEC industry. In order to deal with super large project, Shanghai Xian Dai Architectural Design (Group) Co. innovated a new 3d co-design platform base on BIM & GIS technology. Xian Dai also connect the 3d co-design platform with Project management platform, help all participants achieve the goal smoothly. In this project, XianDai summarized a new way for super large project co-design.