  We study the decay modes $\bar{B}_s\to \phi \pi^0$ and $\bar{B}_s\to \phi
\rho^0$ within the frameworks of two-Higgs doublet models type-II and typ-III.
We adopt in our study Soft Collinear Effective Theory as a framework for the
calculation of the amplitudes. We derive the contributions of the charged Higgs
mediation to the weak effective Hamiltonian governing the decay processes in
both models. Moreover we analyze the effect of the charged Higgs mediation on
the Wilson coefficients of the electrowek penguins and on the branching ratios
of $\bar{B}_s\to \phi \pi^0$ and $\bar{B}_s\to \phi \rho^0$ decays. We show
that wthin two-Higgs doublet models type-II and type-III the Wilson
coefficients corresponding to the electroweak penguins can be enhanced due to
the contributions from the charged Higgs mediation leading into enhancement in
the branching ratios of $ \bar{B}_s\to \phi \pi^0$ and $\bar{B}_s\to \phi
\rho^0 $ decays. We find that, within two-Higgs doublet models type-II, the
enhancement in the branching ratio of $\bar{B}_s\to \phi \pi^0$ can not exceed
$18\%$ with respect to the SM predictions. For the branching ratio of
$\bar{B}_s\to \phi \rho^0$, we find that the charged Higgs contribution in this
case is small where the branching ratio of $\bar{B}_s\to \phi \rho^0$ can be
enhanced or reduced by about $4\% $ with respect to the SM predictions. For the
case of the two-Higgs doublet models type-III we show that the branching ratio
of $\bar{B}_s\to \phi \pi^0$ can be enhanced by about a factor $2$ of its value
within two-Higgs doublet models type-II. However no sizable enhancement with
respect to the SM predictions can be obtained for both $\bar{B}_s\to \phi
\pi^0$ and $\bar{B}_s\to \phi \rho^0$ decays.
