Aiming at solving the problem that the traditional torque sharing function (TSF) control strategy of the switched reluctance motor (SRM) has the disadvantages of poor tracking performance of phase current and high torque ripples, an optimized TSF-based pulse width modulation (PWM) variable duty cycle control of the SRM is proposed. In this method, PWM and hysteresis control are combined, and the control process is sectioned based on the linear inductance model characteristics. The winding voltage is adjusted through changing the PWM duty cycle of different intervals, so as to achieve excellent current tracking and suppress torque ripple. Simulation and experimental results further verify the effectiveness of the proposed method. In comparison with the traditional TSF control strategy, the optimized control method has less current tracking error and lower torque ripple.