Abstract:This paper proposes a method to figure out the current of the branch line based on the load curve and calculate the branch current . It provides the basis for analysis and handling of accidents for operators and dispatchers, and also provides a theoretical basis for services such as distribution network planning. The method adopted in this paper is to calculate the average current of each distribution node through all the distribution variables on a 10kV distribution network line, and then derive the load current of each branch line according to the superposition method. Based on the theoretical basis, the author uses the Xingyi City distribution network as an example to verify that the calculation method is effective and practical. The result was promoted by python programming and used in the distribution network operation of Xingyi City. The following effects were obtained, which solved the problem that the operating personnel could not monitor the distribution transformer and the branch road, and provided a new idea for the distribution network operation management