The utility model provides a special payoff device for measuring the grounding resistance of a power transmission line tower. The payoff device comprises a pedestal and a rotating shaft, wherein a hinge seat is mounted in the middle of the top surface of the pedestal, a connecting block is hinged to the hinge seat, a fixed shaft is fixedly mounted on the connecting block, a connecting sleeve is mounted in cooperation with the fixed shaft, a connecting rod is mounted on the connecting sleeve, and the upper end of the connecting rod is provided with a handle; and the two ends of the rotating shaft are respectively provided with wire coils, the outer end surface of each wire coil is provided with a crank, the middle of the rotating shaft is provided with a shaft sleeve, and the shaft sleeve is fixedly connected with the connecting rod. The special payoff device has the advantages that due to cooperation among the hinge seat, the connecting sleeve, the rotating shaft and related parts, insulated connecting wires of the wire coils can be taken up or paid off at different angles via the cranks, the insulated connecting wires are prevented from deformation and fracture caused by winding or binding, and the special payoff device is also simple and compact in structure, low in manufacture cost and convenient to use.