The rapid development of BIM in 3D design method and visualization technology will bring new changes to all majors in civil engineering. Compared with the building industry, technology of BIM in tunnel engineering is much less developed because of its complex environmental characteristics. The terrain modeling of tunnel engineering is often disjointed with geological drilling exploration, resulting in some geological information missing in the model. To solve the problems, this paper proposes a solution of using Revit volume to build the geological model, which can integrate the drilling exploration information into the model during the modeling progress.