Using RichardWolf vector diffraction integral formulae，the radial，azimuthal and longitudinal component expressions of the focused threedimensional light field of radially polarized highorder vector BesselGauss beams by an objective with primary spherical aberration and obstructed by an aperture are obtained. The effects of primary spherical aberration on the focused light field distribution by the objective obstructed with a circular aperture and an annular aperture are numerically simulated. It is shown that, the influence of spherical aberration on the light distribution at the focal plane is very small especially for the case of the objective obstructed with an annular aperture. In the case of an objective with spherical aberration and obstructed with a circular aperture, the focused light fields before and after the focal plane are not symmetrical. The intensitydistribution change of each point at the focal plane resulted by spherical aberration does not uniformly increase or decrease. The size of the light spot at the focal plane focused by an objective obstructed with an annular aperture is much smaller than the one focused by an objective obstructed with a circular aperture.