The utility model relates to a be applicable to overlength is overweight, and wire insulator chain hangs supplementary hoist, including be used for with hoisting equipment fixed connection's first mounting and the second mounting that is used for fixed connection insulator chain, first mounting with second mounting fixed connection is equipped with fixed notch on the second mounting, fixed notch both sides are equipped with the first mounting hole that runs through, is equipped with the second mounting hole on the last three diagonal connection boards of insulator chain, and three diagonal connection board one end limits are placed in the fixed notch and are passed first mounting hole and second mounting hole and second mounting fixed connection through the bolt. The utility model providesa disposable installation of insulator chain's whole has not only been realized and increased the steadiness of insulator chain hoist and mount in -processs to the hoist.