The general contracting project of 3D parking lot puts forward high requirement for deepening design, collaborative construction and operation management. The project mainly focuses on the combination of the key content of each node with BIM technology organically to fully play its value. During the planning stage, the quantitative simulation analysis is carried out to ensure the rationality of site selection. During the design stage, multi-professional collaborative design is carried out to ensure the depth of design. Also, full pipeline optimization is carried out to ensure the net height of parking lots, and comprehensive structural stress analysis is carried out to ensure safety performance requirements. During the virtual construction progress, construction simulation, cost control and quality control cover all aspects of design and construction management, which ensures the successful implementation of the project. Based on the BIM model, secondary development is conducted to achieve the data transmission and information inter-connection between the hardware and software. The BIM-based intelligence parking management system improves the operation and comprehensive management level of the parking lot, and optimizes the technical and economic indicators of the whole life cycle of the project.