  Hyperon non-leptonic weak decay amplitudes are studied in the chiral
perturbation theory. We employ the low energy effective weak Hamiltonian which
contains the perturbative QCD correction. To include the non-perturbative QCD
effect, quark currents of the effective Hamiltonian are substituted with
hadronic currents which are color singlet and are derived by the chiral
perturbation theory. We find that the amplitudes caused by the product of
hadronic currents are small. It reproduce the small amplitudes of $\Delta
I=3/2$, which are derived by the strong interaction correction.
