  We provided a comprehensive study of the properties of the black hole in the
low-mass X-ray binary system 4U 1543-47, specifically focusing on the 2021
outburst (MJD 59380-59470). Using observations from the \textit{Insight}-HXMT
mission, we employed X-ray reflection fitting method and analyzed spectral data
to estimate key black hole parameters. Through our investigation redbased on 6
out of the 52 available observations, we estimated the spin parameter of the
black hole to be $0.902_{-0.053}^{+0.054}$ and the inclination angle of the
accretion disk to be $28.91_{-1.24}^{+1.82}$ degrees (90\% confidence limits,
statistical only), then we discussed the influence of high luminosity. Based on
the \texttt{relxill} series models are not suitable for thick disk scenario,
and in comparison with findings from other studies, we propose that our
estimation of the spin value may be exaggerated.
