Line loss monitoring system

The utility model discloses a line loss monitoring system, comprising a power transformer, a main station, and first and secondary side electric power circuits respectively arranged at two ends of the power transformer, and also comprising a wireless current transformer arranged on the first side electric power circuit and connected to a wireless data collector, a current transformer located on a secondary side main branch circuit and connected to a multi-function meter; a terminal in connection with the multi-function meter through an RS485 line and meanwhile receiving data information of the first and secondary side electric power circuits; the main station in connection with the terminal through a GPRS/230M private network/ fiber; and a movable line monitor arranged from a main branch line to each user branch line. The main station of the system compares abnormity of electricity information on first and secondary sides in real time to find out areas with problems, and employs the movable line monitor to monitor each branch line so as to fundamentally find out various line losses and electric larceny behaviors in real time, thereby taking corresponding measures for treatment; the line loss monitoring system is simple, reliable and rapid.