In view of the problem of the limited vector action direction and amplitude of the control system in the prediction current control strategy, an optimized three-vector model prediction current control strategy is proposed. First, a virtual vector is introduced to extend the voltage vector control set to provide more flexible control choices for the system. Secondly, the reference voltage vector is obtained according to the difference-free control principle, and the specific position of the reference voltage vector in the sector is determined. Taking the voltage vector as the basic element of the value function, it analyzes the difference between the reference voltage vector and the effective voltage vector. The optimal effective voltage vector is obtained according to the designed screening rules, which simplifies the voltage vector screening process. The experimental results show that, compared with the traditional model predictive current control, the control strategy proposed in this paper significantly reduces the current and torque ripple, and presents a smoother speed curve and smaller overshoot in the speed of the motor. the dynamic response performance and control ability of the motor are improved.