The invention relates to a shockproof hammer resetting device for an overhead ground wire, belonging to an overhauling tool of high-voltage electric lines. The shockproof hammer resetting device is characterized by mainly comprising an impact pipe, pulleys, a loose hinge, an upper balance wing, a lower balance wing, self-locking devices, a left towing plate and a right towing plate; the impact pipe is provided with an axial central through hole through which the overhead ground wire passes; the impact pipe is split into an upper split part and a lower split part in the horizontal direction, and the upper split part and the lower split part are respectively provided with the disc-shaped pulleys; the upper balance wing and the lower balance wing are respectively and symmetrically welded on front side parts of the upper split part and the lower split part of the left section of the impact pipe in a dovetailed shape; the self-locking device is respectively welded on the front surface of the upper balance wing and the front surface of the lower balance wing; each self-locking device mainly comprises an upper locking plate, a lower locking plate, a self-locking handle, a rotating shaft, a spring shaft and a self-locking spring; the upper balance wing and the lower balance wing are reliably connected and fixed by the self-locking devices, so that the impact pipe is stably clamped on the overhead ground wire in a closed manner to impact a shockproof hammer to move to an appropriate position; and therefore the poweroff time and frequency are reduced and the safety is increased.