  In non-central nuclear collisions, the created matter should exhibit strong
vorticity, which induces spin polarization. Global polarization is a good tool
to investigate the dynamics of the system. Global polarization of $\Lambda$ and
$\bar{\Lambda}$ hyperons has been measured at $\sqrt{s_{\mathrm{NN}}}$ = 2.4
GeV - 5.02 TeV in various experiments. We have measured the global polarization
of $\Lambda$ hyperons in Au+Au collisions with fixed-target configuration at
$\sqrt{s_{\mathrm{NN}}}$ = 7.2 GeV at RHIC-STAR experiment. The non-zero signal
is observed and it follows the global trend of $\Lambda$ global polarization
that increases towards lower collision energies. The global polarization is
larger in more peripheral collisions but it does not show any significant
rapidity dependence as well as transverse momentum dependence within
uncertainties.
