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 method of line loss stratified location based on power meter error and power stealing analysis is proposed. This method firstly on the basis of traditional line loss layered locating methods, the introduction of theoretical line loss calculation method, constructed based on the kirchhoff's law courts, a layered model for the line loss, realization of line loss layered calculation, determine the scope of the high loss, and then USES the error analysis model of watt-hour meter, within the scope of the high loss of screening out the error of abnormal watt-hour meter, realize area high loss point positioning; 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 were used to verify the method. The accuracy of the stratified calculation model of line loss in the stations was 100%, the accuracy of the calculation model of power meter error analysis was 88.5%, and the accuracy of the analysis model of power meter stealing was 92%.