Wire harness protection device

The utility model relates to the technical field of wire harness protection, and discloses a wire harness protection device which comprises a gear box body and a wire harness connected with the interior of the gear box body, and further comprises a fixed wire box bolted to one side of the surface of the gear box body, a connecting sliding plate is slidably arranged in an inner cavity of the fixed wire box, a movable wire box is fixed to the other side of the connecting sliding plate, and the movable wire box is connected with the gear box body. First springs are fixed to the two sides of an inner cavity of the movable wire box. When the gear box is used, a worker connects the fixed wire box to the surface of the gear box body in a bolting mode, a wire harness is inserted between the fixed wire box and the movable wire box in a penetrating mode, and in the closing stage of the movable wire box and the fixed wire box, the second extrusion plate and the first extrusion plate can fix the wire harness under the ac