The utility model discloses a high voltage insulation overhead earth wire short circuit device, include box, driving bevel gear, driven bevel pinion, decide the structure with the subsidiary transfer line of driven bevel pinion coaxial coupling, holding rod soon and the clamp of setting on the box that is used for driving initiative umbrella gear revolve, revolve holding rod and driving bevel gear coaxial coupling, driving bevel gear and driven umbrella gear engagement are assisted the transfer line and are rotated with the box and is connected, press from both sides to decide the structure and include vertical screw, press from both sides reservation and crampon spare, and crampon spare includes with vertical screw screw -thread fit's hook seat, is in the couple above the double -layered reservation and is used for the connector of coupling hook seat and couple, is equipped with the shorting stub on the connector, connector and clamp reservation sliding connection. The beneficial effects of the utility model are that: it is rational in infrastructure, can directly hang and put on insulating overhead earth wire, locking and unblock simple operation, it is fixed firm, work processing stability is good, the security is secure.