The third harmonic conversion of Type Ⅰ/Type Ⅱ angle duning scheme of KDP is affected by aberrations of fundamental waves is studied, including the nonuniform distribution across the aperture of refactive index, phase mismatch and etc., which are deduced by aberrations of fundamental waves. The results of transverse intensity distributions and conversion efficiencies of super Gaussian beam with aberrations of Zernike polynomials are presented.