Virtual reality technology has many applications in the field of digital city, virtual assembly and virtual building. Campus navigation system is one issue of virtual reality technology. Virtual campus navigation system could play an important role in decision-making, predicting the future of the whole campus development plan and school management. Campus navigation system is the basis of digital campus and platform. Three-dimensional models in scene affect the sense of immersion for campus navigation system. This paper discusses the modeling technology of simulation scene in campus navigation system, which includes data preparation and layered structure determination and so on. At last, we give the scene model roaming in Lynx environment.