Abstract: Bridges are public buildings with certain symbolic significance. With the development of urban construction, higher requirements are proposed for the bridge design. The application of BIM+GIS technology is able to assist bridge design, express design intention visually, assist leaders in decision-making, and transmit achievement information, which is superior to traditional methods. This paper adopts the UAV tilt photography technology to obtain the real scene model of the project area, and creates a 3D visual design development. A 3D GIS platform, SuperMap GIS, is applied to integrate GIS data with bridge BIM data to build a digital twin, and publish it as online service for convenient viewing anytime and anywhere. The study has effectively explored the application of BIM+GIS in the preliminary design of bridge and its role in the informatization of traffic infrastructure.