The invention discloses a distribution network model discrepant data merging method based on XML files, and relates to the technical field of automatic systems of power distribution networks. The distribution network model discrepant data merging method based on the XML files comprises the following steps that discrepant data of a model are classified, and the data with discrepance are classified into an adding class, a deleting class and a changing class; according to the discrepant data of the model, namespaces of the adding class, the changing class and the deleting class are defined, and the content of the discrepant data are organized to generate three XML files of adding, deleting and changing; the three generated XML files are analyzed, and the discrepant data are merged after verification. According to the distribution network model discrepant data merging method based on the XML files, information of the system model in an automatic system of a power distribution network can be merged more conveniently, the workload of a system manager can be greatly reduced, and working efficiency can be improved; good intercommunication and interconnection are achieved, the data can be separated from the implementation, the performance of the automatic system of the power distribution network is efficient, the normal operation of the automatic system of the power distribution system can be ensured in time, and faults and economic losses can be avoided.