SUnder the new pattern of infrastructure integration for “Outer ring and Inner Network” in the main urban area. The West extension project of Zhongrun Avenue begins. Through analyzing the function orientation of the Zhongrun Avenue, we established the general design principles of the project, and the design essentials are enunciated on the basis of engineering characteristics. We talked about road cross section,BIM technology application, sponge city concept application, quality greenway system construction and key node designing in detail.