The invention discloses a network group, a method for dividing distribution network areas, a distribution network and an analysis method thereof. The network group comprises a physical layer, which includes a topological structure used for representing the network group, components and a connection relationship thereof, and an information base of load information; an algorithm layer, which includes one or more algorithm libraries, wherein the one or more algorithms libraries have algorithms applied to the physical layer to obtain related parameters of the network group; and a function layer, which is used for calling the physical layer and the algorithm layer to execute a specific function. The network group provided by the invention solves the technical problem that the modular boundary division of the distribution network is fuzzy.