  In this work, we study the strong decay of the newly observed $P_{cs}(4459)$
assuming that it is a pure $\Xi_c\bar{D}^{*}$ molecular state. Considering two
possible spin-parity assignments $J^P=1/2^{-}$ and $J^P=3/2^{-}$ the partial
decay widths of the $\Xi_c\bar{D}^{*}$ molecular state into $J/\psi{}\Lambda$,
$D_s^{-}\Lambda_c^{+}$, and $D\Xi_c^{(')}$ final states through hadronic loops
are evaluated with the help of the effective Lagrangians. In comparison with
the LHCb data, the spin-party $J^P=1/2^{-}$ the assignment is preferred while
this of $J^P=3/2^{-}$ is disfavored. The $P_{cs}(4459)$ in spin-parity
$J^P=3/2^{-}$ case maybe explained as $S$-wave coupled bound state with lager
$\Xi_c\bar{D}^{*}$ component. In addition, the calculated partial decay widths
with $J^P=1/2^{-}$ $\Xi_c\bar{D}^{*}$ molecular state picture indicates that
allowed decay mode, $D\Xi_c^{'}$, may have the biggest branching ratio. The
experimental measurements for this strong decay process could be a crucial test
for the molecule interpretation of the $P_{cs}(4459)$.
