In the process of substation construction, there are problems such as many kinds of equipment, complex wiring and difficult site construction. It is proposed to combine BIM technology with virtual reality technology to establish a 3D model of the construction site, so as to realize the fine management of the substation construction site. According to the characteristics of substation buildings and equipment, the equipment model family is divided, and the Revit software is used to establish 3D models of different model clusters. BIM is used to formulate a reasonable construction scheme of power outage and transmission, and to carry out 3D collision test, so as to realize the real-time monitoring and schedule of specific construction steps. The results show that this scheme can continuously adjust and optimize the construction scheme, effectively shorten the construction period and reduce the construction cost.