After analyzing the development status of distribution network communication system,a power distribution communication system common information model (CIM) is constructed according to the characteristics and application requirements of electric power communication system in China.Firstly,the principle and method of CIM modeling are discussed.Secondly,the modeling instances of topological model,equipment model and asset model of communication system are constructed and analyzed in detail.Finally,model split and merge principle are studied.This research provides a method for CIM modeling of network communication system and a solid foundation for network information.