Combining with the engineering practice, this paper starts with the application of BIM technology in civil engineering, steel structure, electromechanical, curtain wall and other specialties, and investigates the BIM platform technology, integrating VR technology, holographic projection technology, QR code technology, progress quality and safety collaborative management technology, and etc. In this paper, the comprehensive BIM application is studied in the construction stage of large-scale urban complex projects, aiming at better combination BIM technology with project construction, to enhance the degree of refinement and simulation in the process of deepening engineering design, and to solve a series of difficult and difficult problems in the process of management of production factors in construction. The comprehensive BIM application serves the whole process of construction, which will further improve the level of project information technology, and promote project management to a higher level.