The utility model discloses a fastening tool for a ground potential live line clamp of a distribution line. The fastening tool mainly comprises an inner hexagonal sleeve, an insulating operation rod, a movable handle and a gear transmission case, wherein the inner hexagonal sleeve sleeves the top end of the insulating operation rod, the gear transmission case is fixed at the bottom part of the insulating operation rod, and the handle which does not rotate along with the operation rod is arranged at a position that is 0.4 to 0.6m away from the bottom end of the insulating operation rod; the inner hexagonal sleeve is in a cylindrical shape, an inner regular hexagon is hollowed out from the cross section, the size of the regular hexagon is matched with threads on a parallel groove line clamp, one end of the inner hexagonal sleeve is fixed on the insulating operation rod and can rotate along with the insulating operation rod in operation synchronously, and the other end of the inner hexagonal sleeve snaps the parallel groove line clamp in operation. By improving the sleeve insulating operation rod, the fastening tool adopts electric equipment for driving, can greatly save physical power of the operating personnel, guarantees the quality of operation, and improves the operation reliability of the distribution line.