Abstract: In order to quickly compute the dynamic response of a tracked vehicle stimulated by the road roughness, a simplified dynamic model of the tracked vehicle is created based on the theoretical mechanics principle and by neglecting some secondary factors. Meanwhile, a dynamic model of the tracked vehicle is built through ADAMS. The comparison between the results of the two models verifies the reasonableness of the simplified model. The results provide a foundation for the optimization design of the suspension system of a tracked vehicle and the inverse dynamics analysis based on the simplified dynamic model.