  In this work, we study the four form-factors $f_1(Q^2)$, $f_2(Q^2)$,
$g_1(Q^2)$ and $g_2(Q^2)$ of the $\Sigma \to n$ in the framework of the
light-cone QCD sum rules approach up to twist-6 three valence quark light-cone
distribution amplitudes. The $f_1(0)$ is the basic input parameter in
extracting the CKM matrix element $|V_{us}|$ from the hyperon decays.
  The four form-factors $f_1(Q^2)$, $f_2(Q^2)$, $g_1(Q^2)$ and $g_2(Q^2)$ at
intermediate and large momentum transfers with $Q^2> 3 GeV^2$ have significant
contributions from the end-point (soft) terms. The numerical values of the four
form-factors $f_1(0)$, $f_2(0)$, $g_1(0)$ and $g_2(0)$ are compatible with the
experimental data and theoretical calculations (in magnitude); although the
uncertainties are large.
