In this paper; we have applied the intermediate boson theory to discuss the nonleptonic decays of hyperons. The various mechanisms of the nonleptonic decays are considered, the "FMS pole" is explained, and the dynamical basis of the sum1 rule 2 Ξ--= Λ-0+31/2∑0+ is given. The decay rates and asymmetries are calculated, and the results are consistent with the experimental data.