This paper proposes a topology identification idea based on the physical equipment and information fusion of the distribution network, which fully combines existing distribution automation master stations, intelligent distribution transformer terminals, smart meter equipment and information data resources, and uses carrier communication technology to reflect the topological relationship of the distribution station area, carry out research on key technologies of distribution network topology identification, in order to realize the comprehensive integration identification of the distribution station-linetransformer-household relationship and the distribution network topology structure, and improve data penetration between different systems ability to provide basic support for intelligent and lean operation and maintenance of the distribution network.