Tour-inspection device for single-phase earth fault point of power distribution network

The utility model discloses a tour-inspection device for a single-phase earth fault point of a power distribution network. The device comprises a frequency signal generator, a grounding wire hook, a hand-held signal detector and a data receiver, wherein the frequency signal generator provides current signals used for test to a tested single-phase line, the grounding wire hook is hung on the tested single-phase line and can move back and forth along the tested single-phase line, the hand-held signal detector moves back and forth along the tested single-phase line to detect the current values of the tested single-phase line at positions passed by, and the data receiver synchronously displays and records the current values detected by the hand-held signal detector; the grounding wire hook is connected with the signal output end of the frequency signal generator, and installed at the top end of a first insulating hand lever; and the hand-held signal detector is mounted at the top end of the a second insulating ha