Disclosed is a live operation method of equipotential tools in a high electric field. In the method which makes use of an insulated jack ladder(3)and a motor winch (2), an insulated pulley(5) and an insulated sling(4)are carried onto an iron tower(1)by an electric tool, and the insulated pulley(5) is hitched at an appropriate position; the insulated sling(4) is threaded through the insulated pulley(5) and then is dropped onto the ground by the electric tool on the tower; one end of the insulated sling is tied onto the insulated jack ladder(3) and the other end is wound on the motor winch (2)by an electric tool on the ground. The motor winch (2)tows the insulated sling(4)and slings the insulated jack ladder(3) and the equipotential electric tools, and when the equipotential electric tools are 1.6-2.6m away from the leads, the motor winch (2)stops towing the insulated sling(4), then the equipotential electric tools enter the electric field through the insulated jack ladder(3) to be potentially equalized with the leads. The method is of good flexibility, safety, reliability and is time-saving and labor-saving.