Distribution network overhead insulated process soon, but on the rod with variable area common switch, surge arrester, the grounding wire clip, pillar and other body parts in place of more brought operation point of failure, poor insulation safety conditions, installation and complex, difficult and high cost of maintenance, live working conditions such as series of problems. In response to the above problems, we must to stem some of the equipment with variable system and wiring connection, to simplify the device, further increase the purpose of he operation safety