Hyper chaotic behavior of whole vehicle model is found in this research. According to idiographic 14 dimension nonlinear dynamic system, the method of global bifurcation, frequency chart and poincare maps are used simultaneously in the study. Strange hyper chaotic attractor of each dimension are obtained. Lyapunov exponents chart calculated result imply the hyper chaotic characteristic and unstable range of nonlinear system. Numerical value study indicate that in the special range of bifurcation parameter, system exist chaos, hyper chaos, and so on. From bifurcation diagram, the system exist converse motion that from period to chaotic vibration. The method of analysis is important instructional significant to vehicle dynamic design and dynamic control under the condition of different surface of road.