  An Aoki-Denner form of the renormalization scheme is suggested for the
physical amplitudes in MSSM. The Higgs sector is reparameterized with the mass
of the CP odd scalar, and the mass of the heavy CP even one instead of
$tan\beta$ in our scheme. The counterterms of $tan\beta$ is fixed
perturbatively on mass shell just within
  Higgs sector. The counterterms of gauge-scalar mixings are defined with
Ward-Takahashi identit ies from scalar-scalar mixings. The effect of the
reparameterization is also probed on the radiative correction of the mass of
the lightest Higgs.
