Abstract: The inverse saliency (L_q < L_d) characteristic of the flux intensifying interior permanent magnet (FI-IPM) motor not only enhances the output torque with the positive d-axis current, but also causes the alternating positive and negative changes of the d-axis current during the flux weakening condition, large changes in current angle and flux fluctuations. Furthermore, it will also result in large torque ripple, current distortion oscillation, slow response, and etc. Hence, to solve these problems, a full-speed domain model predictive direct torque control strategy of the FI-IPM motor based on partition flux is proposed. According to the relationship between the speed operating region and the flux state of the FI-IPM motor, the predictive model of the torque and flux are constructed. On this basis, the partition flux control is presented, and the flux difference is taken to assess the operation of the intensifying flux domain and the flux weaken domain, where the flux linkage compensation is carried out. In this way, the oscillation and instability problems of the operating domain switching can be solved. Finally, the effectiveness of the proposed control strategy is verified by the experiments, which provides a technical scheme for the application of the motors in the electric drive system.