With the increasing number of urban bridge renovation projects,traffic organization problems during reno-vation become increasingly prominent.Taking the Hedong Bridge Major and Medium-sized Repair Project as an exam-ple,this article analyzes the traffic flow before the renovation,performs macroscopic simulation prediction during the renovation,and conducts microscopic simulation prediction for the affected intersections to propose specific and reason-able traffic improvement measures for related sections,constructing a scientific,systematic,and effective traffic organi-zation plan to minimize the impact of closed traffic on citizens'daily lives and providing a solid guarantee for the suc-cessful implementation of the project.