Aiming at the problems such as long period of line loss control and inaccurate location of high loss point in low voltage station area, a hierarchical line loss location method based on the analysis of electricity meter error and stealing electricity is proposed. Firstly, on the basis of traditional hierarchical line loss location method, this method introduces the theoretical line loss calculation method, constructs the hierarchical line loss calculation model of station area based on the Kirchhoff's law, thus the hierarchical line loss calculation is realized, the scope of the high loss is determined. Secondly, the error analysis model of electricity meter is designed, the error of abnormal electricity meter is screened out within the scope of the high loss, so as to realize the high loss point positioning of station area. Finally, the analysis method of electricity stealing is designed, and the frequent item set related to electricity stealing behavior is mined through alarm events to further verify the high loss point and determine the cause of high loss. The actual data of 50 stations are used to verify the method. The accuracy of the hierarchical calculation model of line loss in the station area is 100%, the accuracy of the calculation model of electricity meter error analysis is 88.5%, and the accuracy of the analysis model of electricity meter stealing is 92%.