Lightning arrester protection device

The utility model discloses a lightning arrester protection device, and relates to the field of lightning arresters. Comprising a fixing plate, a fixing assembly is arranged on the fixing plate, the fixing assembly comprises a moving frame, the moving frame is of a frame structure with an opening in one end, a limiting block is arranged on the bottom wall, close to the fixing plate, of the moving frame, a limiting sliding rail is arranged on the fixing plate, and the limiting block is matched with the limiting sliding rail; a two-way screw rod is rotationally connected between the two opposite side walls of the movable frame and comprises a forward screw rod and a reverse screw rod, a first sliding block is arranged on the forward screw rod, a first arc-shaped plate is arranged at the end, away from the bottom wall of the movable frame, of the first sliding block, and a second sliding block is arranged on the reverse screw rod; a second arc-shaped plate is arranged at the end, away from the bottom wall of the