In order to solve the problem of wide rotor bearingless switched reluctance motors are prone to large torque ripple during operation due to the switching power supply method and double salient iron core structure, the rotor structure of a bearingless switched reluctance motor with wide rotor is improved by slotting on both sides of the rotor. By increasing the air gap magnetic resistance near the slots, the tangential air gap magnetic density used to generate torque can be increased, so that the torque ripple can be reduced. After the slots are parameterized, the control variates method is used to analyze the impact of slotting parameters on torque performance, and the slotting parameters are finally determined with the goal of optimizing performance indicators. By using the method of field circuit coupling, the finite element analysis model of the motor and the direct instantaneous torque control circuit model are combined to achieve the dynamic operation of the motor system. The simulation results show that slotting on the rotor can effectively reduce the torque ripple of the bearingless switched reluctance motor with wide rotor, and improve the average torque, while has little impact on radial suspension force.