The invention relates to a power grid automation isolation device including an isolation device body, utility poles and mounting rings. The isolation device body includes an isolation box, signal receiver, signal transmitter, controller, rotating electric machine, couplings, connectors, insulating sleeve, a first fixed contact and a moving contact, A low end of that utility pole is fixedly connected with a tapered plug rod, A loop groove is arrange at that upper end of the telephone pole, two mount rings are arranged on the outer side of the groove, both port of that two mounting ring are fixedly connected with connecting blocks, the two connecting blocks are provided with threaded holes, A fixing bolt is arranged on one side of the threaded hole, A fixing bolt is threadably connected withthe two connecting blocks through a threaded hole, Two mounting rings are spliced to form a ring, and the inner diameter of the ring is equal to the outer diameter of the groove on the telephone pole. The device adopts four fixed contacts and four movable contacts, and realizes the quick line switching through the contact of the fixed contacts and the movable contacts, thereby improving the overall adjustment efficiency of the device.