  The two body charmless decays of $B_s$ meson to light vector mesons are
analyzed within the framework of QCD factorization. This approach implies that
the nonfactorizable corrections to different helicity amplitudes are not the
same. The effective parameters $a_i^h$ for helicity $h=0,+,-$ states receive
different nonfactorizable contributions and hence are helicity dependent,
contrary to naive factorization approach where $a_i^h$ are universal and
polarization independent. The branching ratios for $\bar{B}_s\to VV$ decays are
calculated and we find that branching ratios of some channels are of order
$10^{-5}$, which are measurable at future experiments. The transverse to total
decay rate $\Gamma_T/\Gamma$ is also evaluated and found to be very small for
most decay modes, so, in charmless $\bar{B}_s\to VV$ decays, both light vector
mesons tend to have zero helicity.
