For the influence of vibration and noise problem of switched reluctance motors,the paper applies maxwell stress method,considering the magnetic saturation of ferromagnetic materials and the edge effect of flux,analyzing and calculating the flux density of air gap and electromagnetic force.The nonlinear mathematical model of magnetism and solid coupling of the stator system is set up.This model conforms to the actual operation characteristics of switched reluctance motor,provides the theoretical reference for optimizing design of the motor.With a prototype as an example,results show that the model of the 2D finite element analysis of the results compared to verify the correctness of the mathematical model.