The invention relates to an automatic feeder-range refreshing method, which comprises the following steps of downstream traversing the equipment of a current feeder from a substation exit according to a topological sequence, recording the branch which the current equipment belongs to and the feeder, and setting the current branch; setting the branches according to the different conditions of the branches which the equipment belongs to; traversing the subsequent equipment and the branches which the subsequent equipment belongs to, and processing according to conditions. The automatic feeder-range refreshing method has the beneficial effects that the belonging and hierarchical relation among the branches on a line is determined in an automatic mode, which is favorable to the management for the branch relation; the managing mode for the line is more approximate to the actual operating mode of an electric power line, which is favorable to the understanding and the maintenance of a user for the line; the modeling workload of the user is reduced, the accuracy of data maintenance is improved, and the availability of a system is improved; data after being refreshed are closer to the actual line-managing condition of the user, so that the maintainability of the data is improved.