Abstract: In order to promote the application of BIM technology in railway engineering design, facilitate the railway line locate designer to understand BIM platform for railway line modeling, this article combined with the pilot project of Shanghai — Nantong Railway ( abbreviated as Hutong Railway), explored and expounded the 3D terrain modeling module, the railway location module and the process of railway location design based on Bentley PowerCivil platform which was one of the BIM platform, and then established successfully the 3D terrain model and railway line model. The models could provide basic data for modeling of bridges, geologies, stations and so on. The successful application of Bentley PowerCivil platform on the pilot project of Hutong railway would provide a reference for BIM design of railway line based on the platform in the future.