The invention provides a method of reducing the radial electromagnetic force of a switch reluctance motor and a structure thereof. Through mutual nesting of rotor magnetic poles and stator magnetic poles in the axial direction, the radial electromagnetic force is reduced so that the objectives of reducing the vibration and the noise of a motor are achieved. Through the magnetic induction intensity of the rotor magnetic poles and the stator magnetic poles in axial air gaps, the electromagnetic torque required for the rotation of a switch reluctance motor is generated. The motor structure comprises a stator, a rotor, rotor magnetic poles, stator magnetic poles and stator windings; the external radius of the rotor magnetic poles is greater than the internal radius of the stator magnetic poles; the stator magnetic poles and the rotor magnetic poles are of a multi-layer structure in the axial direction of an electrode; the axial layered structure realizes mutual nesting of the stator magnetic poles and the rotor magnetic poles. The rotor magnetic poles and the stator magnetic poles form mutual nesting in the axial direction and the electromagnetic torque required for the rotation of the switch reluctance motor is generated by means of the magnetic induction intensity of the rotor magnetic poles and the stator magnetic poles in the axial air gaps, so that the radial electromagnetic force is greatly reduced.