The utility model relates to a power supply unit, specifically speaking are high voltage electricity circuit earth connection action bars, including telescopic electroscope insulator spindle, the telescopic joint department of insulator spindle is equipped with outer locking device, acromere insulator spindle rear end is equipped with the handle, characterized by is equipped with the Y font support of compriseing connecting rod and two pulley branches, the connecting rod is connected with internal insulation pole front end through the screw thread, be equipped with the pulley on the pulley branch on the support respectively, in using, the position of establishing earth connection is hung according to need, adjust insulator spindle length, then with the fixed locking of outer locking device, be connected the earth connection with insulating rope, two pulleys are introduced to the one end of restricting that will insulate again, the insulating rope of a finger -tight, the control operation pole stretches to on the other hand needs to hang the wire head department that establishes the earth connection, treat that earth connection wire end dop is located when waiting to hang directly over the wire, it withdraws from two pulleys and will insulate the rope and be connected fixedly with high -pressure pylon to unclamp insulating rope, and is advantaged by simple operation, time saving and labor saving, high safety, advantages such as position accuracy are hung to the earth connection.