  Many analyses have concluded that the accretion disc sizes measured from the
microlensing variability of quasars are larger than the expectations from the
standard thin disc theory by a factor of $\sim4$. We propose a simply model by
invoking a strong wind from the disc to flatten its radial temperature profile,
which can then reconcile the size discrepancy problem. This wind model has been
successfully applied to several microlensed quasars with a wind strength
$s\lesssim1.3$ by only considering the inward decreasing of the mass accretion
rate (where $s$ is defined through $\dot{M}(R)\propto({R}/{R_{0}})^{s}$ ).
After further incorporating the angular momentum transferred by the wind, our
model can resolve the disc size problem with an even lower wind parameter. The
corrected disc sizes under the wind model are correlated with black hole masses
with a slope in agreement with our modified thin disc model.
