Owing to the strong dependence of model predictive control on system parameters, the whole system will be unstable when the parameters are disturbed. Therefore, this paper aims to strengthen the parameters robustness of the prediction control system. Specifically, a sliding-mode based model predictive voltage control is proposed to regulate the parameter disturbance. And a reference voltage predictive function is constructed on the foundation of the designed sliding mode reaching law. Finally, aiming at verifying the parameter robustness of the proposed strategy, the motor parameters are changed by building simulation, and the conventional method is compared with it. And the availability of the proposed strategy is proved.