The optical pupil filter is regarded as one of the most important devices in the manipulation of intensity distribution in the focal volume. The effect of different incident light distributions on the superresolution performance and the depth of focus (DOF) of superresolsing pupil filters are studied based on the scalar diffraction theory of light. The results indicate that there is little change of superresolution performance and DOF extension when the light with Gauss function distribution incidents compared with uniform light incidence with equal total incident light energy; little change of spot compression ratio is shown, the Strehl ratio is lower and the DOF is extended when the incident light with Gauss function distribution incidents; while for the incident light with the first order Bessel function, the spot compression ratio and the DOF decrease, the Strehl ratio gets large increase. In general, superresolution can be more easily realized with more light intensity distributed along the verge of the pupil, and the increase of either Strehl ratio or DOF is based on sacrifice of the other one.