Top quark rare decayt→cHiin the minimal supersymmetric model

The top rare decays $t\to c{H}^i (H^i=H,h,A)$ induced by loop effects of the genuine supersymmetric particles are calculated in the minimal supersymmetric model. The analytic expressions are given for the partial width of these processes. The branching fraction of $t\to \mathrm{ch}$ ($h$ is the lightest Higgs boson) is found to be the largest one, the maximum level of which is $B(t\to ch)\sim {10}^{-5\mathrm{}}$.