  We calculate the squarks one-loop corrections to the cross sections of the
chared Higgs boson pair production in photon-photon collisions in the minimal
supersymmetric extension of standard model(MSSM). In general, in case of the
large splitting in the masses of left-top squark and the right-top squark and
for $\tan\beta$ near 1.5, the corrections can reduce the cross sections by more
than 10% for a wide range of the charged Higgs boson mass, depending on the
$e^+e^-$ center-of-mass energy. But in other cases, the corrections are at most
only a few percent. Those corrections can be comparable to the $O(\alpha
m_t^2/m_W^2)$ Yukawa corrections in previous literature.
