Abstract: The influence of new energy access on distribution network structure and traditional segment positioning was analyzed, and a segment positioning method adapted to new energy access distribution network under 5G communication architecture was proposed. In this method, the main and auxiliary circuit breakers in the distribution network were divided into class Ⅰ and Class Ⅱ regions, and a variety of 5G communication architectures suitable for section location were constructed by combining the edge computing deployment and downscaling functions of 5G communication networks. Regional fault location criteria based on direction comparison and section fault location criteria based on switching function were proposed. By using 5G network slicing technology, the fault locating methods based on 5G communication were designed for class Ⅰ and Ⅱ regions, respectively. Combined with IEEE-119 node distribution network simulation, the accuracy and reliability of the proposed method were verified.