In view of problems of switched reluctance motor’s special doubly salient structure and nonlinear magnetic saturation resulting in large electromagnetic noise, designed a new structural single-phase switched reluctance motor to compute the radial force which causing electromagnetic noise, and analyzed the radial force generation principle and distribution. Applied finite element simulation software Ansoft to simulate its static and dynamic magnetic field, and from structural parameters optimized the radial force on stator, thereby reducing electromagnetic noise and torque ripple of single-phase switched reluctance motor.