Abstract: Aiming at the problems of the BIM+GIS visualization application scheme, such as complex deployment and application, dependence on commercial software and high bandwidth requirements, this paper developed and designed a set of railway BIM visualization comprehensive system based on .NET6 technology. The paper implemented the BIM model parsing, deployment, application integration, model data cloud publishing, local caching and other functions through technologies such as Industrial Foundation Class (IFC) file parsing and conversion, digital analog separation, and attribute data storage. The system can deploy and apply the BIM model achievements within the scope of railway simplex points, single yard sections, stations, etc. It is an effective supplement to the existing BIM+GIS large-scale model deployment scheme. The application of the system is conducive to the BIM achievements at this stage to play a greater application value, and provides a reference for the flexible deployment of actual engineering projects.