The invention discloses a Zigbee network communication based feed line segmented protection system. Multiple fault detectors are mounted on a feed circuit of a power distribution network and are usedfor monitoring electric parameters including voltage, current, zero-sequence voltage and zero-sequence current and the like of the circuit in real time. When a fault occurs on the circuit, the fault detectors judges whether the circuit meets the fault or not and determines the type of the fault according to voltage and current value set in advance at the same time. Signals are sent to adjacent fault detectors through a signal transmitter via a Zigbee network. The fault detectors judge whether the fault occurs on the feed circuit between the two fault detectors or not through data comparison. If the fault occurs between the two fault detectors, the fault detectors send trip signals to a relay protection device in the zone and disconnect the fault circuit. If the fault does occur between thetwo fault detectors, the fault detectors send locking signals to the relay protection device and prevents override trip of the relay protection device so as to reduce the power failure range.