Parallel-gap adjusting lightning-protection device in double-umbrella-frame shape for insulator

The utility model discloses a parallel-gap adjusting lightning-protection device in the double-umbrella-frame shape for an insulator. The device comprises the insulator. Two ends of the insulator are fixedly connected with a ground-side electrode and a wire-side electrode. The ground-side electrode and the wire-side electrode are respectively a claw with at least three claw fingers. Claw fingers at two sides of the insulator are equal in number and are correspondingly arranged. The device provided by the utility model is simple in structure, and is convenient to install. The claw fingers of the wire-side electrode or the claw fingers of the ground-side electrode are connected movably. The claw fingers make plane movement along the axis of the insulator, so as to adjust the distance between the ground-side electrode and the wire-side electrode. The device is suitable for insulators with different lengths.