Abstract: The permanent magnet synchronous generator (PMSG) has multi-variable, nonlinear and strong coupling features, so the system performance will be influenced by the system parameters variation. Therefore, the sliding mode controller is designed, and the corresponding converter control system is proposed based on the mathematical model. According to system state, the hysteresis function is adopted to set up the accurate sliding track for system running. The system has good anti-jamming capability, and the high frequency switching buffeting effect can be controlled. The model has been built in Matlab/Simulink enviroment and the simulations have been conducted for PMSG which has eight poles and five thousand watts. The simulations of voltage, current and power has been conducted, the results show that the system has small impact on the grid, high tracking accuracy, good dynamics, stability and robustness performance.