In order to solve the integral saturation problem in speed regulating system of switched reluctance motor (SRM), which leads to the poor control performance, a design method of variableproportiondesaturation PI regulator is proposed, and its related parameter setting method is given. By utilizing the MATLAB/Simulink tool, the PI regulator performance of the traditional method, the antisaturation method and the variableproportiondesaturation method are verified under the conditions of constant speed with noload and variable speed with load, respectively. The results indicate that the variableproportiondesaturation PI regulator has better dynamic performance and antidisturbance performance.