A self-powered shock absorber combining vibration energy recovery and vibration control can achieve better vibration suppression without relying on external energy， which can effectively improve drive comfort and fuel economy of vehicle. In this paper， we analyze nonlinear characteristics of self-powered intelligent shock absorber. Furthermore， we systematically investigate the self-coupling control strategy of vibration energy recovery and vibration control. The self-feedback with Karnopp control rules suspension is modeled， and the active control strategy is applied to self-powered intelligent shock absorber. The control strategy was simulated using MATLAB/Simulink， which was compared with the self-feedback control and the passive suspension control. The results demonstrate that the dynamic displacement of tire and suspension are further reduced， and the peak acceleration of the body is reduced by almost half， meaning that the performance of vehicle suspension is improved effectively.