In order to study the effct of different spherical aberration distribution between the double lens and single mirror on the compensation results of catadioptric compensator,based on the third-order aberration theory,aiming at two concave paraboloidal surfaces with different relative apertures,a set of catadioptirc compensators with different spherical aberration assignment were designed,and the curves of the design results were drawn.The curves indicate that,when the spherical aberration bearing ratios of t...