This paper investigates the magnetism and soldid coupling dynamic equation of the statorsystem;The main exciting force of the vibration is electromagnetic force in the stator that is calculatedusing the Maxwell tensor and the magnetic method in consideration of the radial vibration displacementswith the magnetic field in air gap coupling of the stator core;By means of the combinationmethod of beam function,the analytic expressions formula of the radial vibration displacements of statorcore is derived.The model conforms to the actual switched reluctance motor structure and operationcharacteristics.This paper provides theory basis of switched reluctance motor for structure optimizationdesign and prediction and control of electromagnetic vibration and noise.With a model of 8/6switched reluctance motor as an example,this paper verify the correctness of the analytical modelscomparing its results with the one obtained using the finite element method.