The utility model discloses a grounding wire device used for power transmission line overhauling, which comprises a grounding hook and a grounding clamp which is connected to the grounding hook through a lead, wherein the grounding hook is bent into a top end straight part and a lower part hook part by a plate, a clamping plate is arranged between the top end straight part and the lower part hook part, the middle position of the clamping plate is fixedly connected with a pull rod, the upper end of the pull rod passes through a pull rod hole formed in the top end straight part of the grounding hook and is connected with a pull rope through a pull rope ring, parts of the clamping plate on two sides of the pull rod are respectively fixed and connected with a bolt, the upper end of each bolt passes through a screw hole formed in the top end straight part of the grounding hook and is fixed by a nut, and bolts arranged between the clamping plate and the top end straight part of the grounding hook are sleeved with springs; the middle part on the front side of the clamping plate is connected with a hanger, and the middle part on the front side of the top end straight part of the grounding hook is provided with a clamping groove matched with the hanger; and the pull rod arranged between the clamping plate and the top end straight part of the grounding hook is embedded with a hanging buckle. The grounding wire device has the advantages of good anti-dropping performance, strong application flexibility and the like.