  The strong decays of the heavy baryons \Sigma^{(*)}_Q \to \Lambda_Q \pi are
studied by combining the chiral dynamics and the MIT bag model. In charm
sector, we calculate the decay widths \Gamma(\Sigma^{(*)}_c\to \Lambda_c\pi)
and compare with the experimental data and other theoretical estimations. In
addition, we also predict the strong decay widths \Gamma(\Sigma^{(*)}_b\to
\Lambda_b\pi).
