The invention relates to a resource allocation method and system of a power distribution network. Hardware parameters and environment parameters of power distribution equipments in all regions of the power distribution network are collected; resource index values of the regions are calculated by utilizing the parameters; all the regions are ordered according to the resource index values; and a power-distribution resource adjusting scheme is determined according to the ranking difference of the regions under different resource indexes, and resources, of the power distribution network, of the regions are adjusted. The method and system focus on whether present resource allocation of the regions is reasonable, if YES, ranks of the regions under different resource indexes should be consistent, and if the ranks are inconsistent, the resources, of the power distribution network, of the regions need to be adjusted; and thus, the resources of all the regions in the network are allocated reasonably, power practical and development requirements of the regions are met, and the resource utilization rate of the power distribution network is improved.