Abstract: For those problems during the BIM implementation in bridge design, this article using the 128m Simple-arch bridge project of Mujia Passenger Dedicated Line as an example to conduct in-depth studies. Based on the actual situation of the construction site, this project uses Catia software for design development and deepening design, which can quickly find all clashes in the model. The 3D model profile can improve the accuracy of setting out, and the 3D construction simulation can improve efficiency of construction. These data contributes to the efficiencies of subsequent construction project and helps to the project digitalization.