Insulation cover shielding air live line

The invention discloses an insulation cover shielding an air live line. The insulation cover comprises a shielding apparatus, a transmission apparatus and an insulation hollow pipe. The shielding apparatus comprises a push-and-pull plate, a fixing sliding plate, a universal sliding plate, an upper insulation cover and a lower insulation cover. The push-and-pull plate comprises a first push-and-pull plate whose one end is hinged to the upper insulation cover and a second push-and-pull plate whose one end is hinged to the lower insulation cover. The other ends of the two push-and-pull plates are hinged into a bar-shaped sliding hole on the fixing sliding plate through a pin and can be close to or far away from the insulation hollow pipe along the bar-shaped sliding hole. The fixing sliding plate is arranged in the insulation hollow pipe and possesses a first connection portion and a second connection portion which are stretched out from two opposite sides of the insulation hollow pipe. One end of the universal sliding plate is hinged to the lower insulation cover and the second push-and-pull plate through the pin and the other end is hinged to the transmission apparatus so as to receive a driving force. Under the driving of the transmission apparatus, the upper insulation cover and the lower insulation cover can be opened or closed so that insulation isolation to an air live conductor and a wire clamp is realized.