Abstract: In this paper, the generalized diakoptics for large-scale linear networks is extended to the nonlinear generalized diakoptics for large-scale nonlinear networks.On the other hand, the nonlinear generalized diakoptics is an extension of the nonlinear diakoptics. The later uses the f hybrid base and is applicable only to the nonlinear networks having no coupling between their y subnetworks N₁ and z subnetworks N₂. The former uses a generalized hybrid base and is applicable to the nonlinear networks having coupling between their y subnetworks N₁ and z subnetworks N₂.