In response to the difficulty and time-consuming problem of tuning the parameters of the current inner loop and speed outer loop proportional integral (PI) controller in field oriented control, a parameter self-tuning model for a permanent magnet vernier motor magnetic field orientation control dual closed-loop speed regulation system is constructed based on the field oriented control autotuner (FOCA) module in Matlab/Simulink. This module injects a sinusoidal disturbance signal into the output of the PI controller, calculates the frequency response based on the system input and output data, automatically adjusts the PI parameters based on the frequency response, and achieves the specified target bandwidth and phase margin. Finally, the control performance of each loop before and after tuning are analyzed and compared by simulation, and the simulation results show that using the FOCA module can quickly and automatically adjust the PI controller parameters and has good control performance.