Abstract: The integration of BIM and VR/AR technologies brings new opportunities to the construction industry. This paper expounds the relationship among the BIM, VR and AR technologies respectively, and strives to realize the development of VR and AR application instances by studying the BIM model optimization. In this way, the project participants are able to understand the design intention more intuitively, thus promoting the guidance of site construction and optimizing the on-site operation methods and techniques.