Abstract: Design stage is the key of controlling the cost and quality of construction projects. In the traditional two-dimensional building design, buildings are expressed mainly by four basic drawings: plan view, elevation view, section view and large sample drawing, which inherently lacks the capability of presenting the design effect and avoiding the collision of different building elements of different disciplines. Building information modeling (BIM)technologies enables collaborative design and integrated analysis in a 3D environment, and provides more intuitive real-time interactive renderings through 3D model rendering, which will improve design quality and communication efficiency. Taking the project of the comprehensive experimental building of Southwest University of Political Science and Law as a case study, this paper introduces the practical experiences of BIM application in design stage, including sunlight analysis, conflict analysis, compliance check, multi-disciplinary collaborative deepening to actively explore the in-depth application value of BIM technology in the design stage.