Abstract: The permanent magnets synchronous motor (PMSM) has advantages of high efficiency, high power density, and control flexibility, etc. Thus, the research on high-efficient control of the PMSM can further improve the operation efficiency of the motor system, which benefits the application in rail traffic, aerospace, equipment, and renewable power system. However, it is difficult to adjust the permanent magnet magnetic field, which leads to obvious difference between low-speed and high-speed regions, and it is also difficult to achieve efficient operation in a wide-speed region. Therefore, from the perspective of different speed regions, this paper analyzes the system constraints and gives the corresponding high-efficient control goals. In different speed regions, the classification of high-efficient control strategies is presented, and the advantages and disadvantages of different methods are summarized. Finally, from the point of operation region and control method, this paper summarizes and prospects the high-efficient control strategy of PMSM in full speed region.