Abstract: The Qianhai Cooperation Zone is positioned in the national strategy, aiming at matching worldwide first-class quality, and faced with many challenges such as time constraints, cross-cutting, and etc. For solving the problems of large volume, high standards, overlapping and short time in development and construction, Qianhai Cooperation Zone has launched the first digitized new city construction based on City Information Modeling (CIM) in China and even in the world. The CIM model integrates the geographic information model, geological information model and infrastructure information model. CIM is an innovation of construction management modes such as planning, design and construction, and provides a unified carrier for the intelligent management of urban operation, which is a typical representative of the new digital city. This paper focuses on the integrated application of design and construction based on BIM technology.