Abstract: The line loss rate of low-voltage distribution station area is an important basis for the power supply company to carry out anti-stealing work.At present, the line loss rate is calculated from the sum of the three-phase power supply and sales in the station area.There are short comings that the line loss rate of slation area of power-stealing users cannot be detected within qualified range.A calculation method of split-phase line loss rate in the station area is proposed based on the power information acquisition system and the high power line communicationtechnology.Combined with examples, it is shown that the split-phase line loss rate in the station area is conducive to identifying more station areas with high line loss and locating the range with high line loss more accurately, compared with the line loss rate of the station area.