Abstract: To replay the process of bridge collapse scientifically and realistically and assist the technical appraisals for bridge collapse accidents, the scene simulation of bridge collapse on VR platform based on FEM is studied in this paper. By the data of FEM simulation of bridge collapse, the bridge scene model and the animation of bridge collapse are realized in 3D graphic engine OSG. Based on the model of bridge collapse, a scene walkthrough system with realistic graphics is developed in this paper. By comparing the animation of bridge collapse in OSG with the FEM simulation of bridge collapse, the methods of creating bridge scene model and realizing the animation of bridge collapse prove to be operative. This paper combines FEM simulation and VR simulation to provide a scientific and realistic virtual scene for the technical appraisals of bridge collapse accidents.