Abstract: The taper permanent magnet motor was analyzed and the effectiveness of two methods on handling of problems concerned with non-uniform distribution of magnetic field along axial direction in electric motor was studied,which were sectional calculation method and 3D finite element method. The analyzed results were verified by no-load EMF experiment of the electric motor. Then the variation of direct axis and quadrature axis inductances was obtained by 3D finite element method for the taper permanent magnet motor with the taper rotor at different axial locations. And the inductances of a prototype were measured at different test frequency and with taper rotor at different axial locations. The experimental results which agreed well with calculated results by 3D finite element method verified the validity of the analyses.