Abstract: When the high-speed train runs beyond the critical speed of hunting stability, there will be potential safety hazards. In this paper, the mathematical model of CRH2 bogie is established. Through the simplified treatment and stress analysis of axle box body, an overall model is built in Pro/E software, and then imported into the Mechanica module to establish rigid and elastic joints for the CRH2 axle so as to perform static strength analysis. The results show that the simplified CRH2 bogie model has some improvement over the initial model in terms of critical speed, and all dynamic parameters meet the requirements of industry standards.