Abstract: The large volume modeling, multi-source information fusion and deep green design are all the frontier technologies of BIM.This paper proposes a whole modular BIM modeling method including lightweight modeling, parametric modeling, moderate modeling and hierarchical block modeling.A BIM+VR design platform was built using Qt frame based on multi-language programming.The data interface is opened and connected between the BIM technology and other technologies, i.e.VR, 3D printing and 3D roaming.The BIM-based performance analysis and simulation is implemented in depth.All the frontier BIM researches and practices on large volume modeling, multi-source information fusion, and performance analysis and simulation, realize the fast exhibition of design content, exact expressions of design intention, optimization and completion of design scheme, and assistance of owner's project decision making, which assists in achieving the design goals of a "Green, Eco-friendly, Land-Saving, Intelligent & Livable" city.