Abstract: In order to achieve the goal of fine control of linear engineering construction such as municipal bridges, the comprehensive use of BIM+ IOT technology and bridge digital management monitoring platform technology is used to establish a digital bridge model around the bridge construction stage using BIM technology. The model accuracy is LOD500, including component coding, pile position coordinates and other component information, as well as component production and installation process information data integration, providing data assets for later operation and maintenance;During the construction process, auxiliary materials management such as templates and reinforcement are required for the detailed design;Conducting visual demonstrations through key process simulation construction and project-wide navigation;High-formwork safety calculation is carried out with the help of finite element analysis and other technologies;The visual monitoring platform achieves construction process, equipment and facilities, environmental monitoring, and structural deformation monitoring to ensure the safety of bridge construction.Through the above technical means, it achieves digital management of the entire process of bridge construction, collaborative data sharing, and assists in the fine management of the project.It transforms from traditional construction methods to digital construction, and the implementation process and methods of the project can provide a reference for similar bridge engineering project management.