Vehicle suspension system is a typical nonlinear system. Backstepping control theory is
applicable to control of nonlinear system. In this article, an active suspension system model based onbackstepping control strategy was established. It was proved that the active suspension system posedproperty of global asymptotic stability and could reach the goal of avoiding suspension stroke whenvehicle met a road bump. Simulation research of a vehicle single tire suspension traveling over roadbump was studied. Simulation results demonstrated that performance of active suspension system withbackstepping control strategy presented in the article was superior over active suspension with optimalcontrol and passive suspension and avoided suspension stroke, when vehicle traveled over road bump.Key Words: Vehicle, Active suspension, Nonlinear, Backstepping, Simulation