Abstract: Line loss management in the power supply station is an important task and also an important indicator that affects the company's operational efficiency. The current management mode of line loss in power supply substations is based on meter reading data to calculate the purchased and sold electricity and line loss rate in the substation area. The abnormal line loss in the substation area mainly includes two types: high loss and negative loss. The article introduces the experience of line loss management in substation areas from two aspects: the analysis of the causes of abnormal line loss in the substation area and the management methods of abnormal line loss in the substation area. In order to improve the economic operation rate of line loss in the same period in the power supply station.