The invention relates to an electric wrench for a ground potential insulating operation rod. The electric wrench comprises the insulating operation rod and a charging type wrench. The insulating operation rod comprises an upper connection pipe and a lower connection pipe. The upper connection pipe is connected with the lower connection pipe. A square tenon for installing a hexagonal socket is connected to the upper connection pipe. A connection socket is arranged on the lower connection pipe. A protection sleeve is arranged on the connection socket. The electric wrench has the beneficial effects that operation of the insulating operation rod is achieved through the charging type wrench connected to the insulating operation rod, and compared with existing operation of operators, the strength during work is lowered, the hot-line work efficiency is improved, the electric wrench can adapt to hot weather environments and complex terrain areas, and the requirement for physical power of the operators is lowered during operation; the insulating operation rod is arranged to comprise the upper connection pipe and the lower connection pipe, and compared with an existing single operation rod, the electric wrench has the beneficial effects of being convenient to carry and low in manufacture cost; and fixed connection of the charging type wrench is achieved through the connection socket, and protection is achieved through the protection sleeve.