The utility model discloses a transmission line's pay-off belongs to the circuit and lays instrument technical field. Including haulage vehicle, cable drum and two earth anchor bases, railway carriage bilateral symmetry at haulage vehicle sets up the earth anchor base, fixes two vertical carrying bolts on every earth anchor base respectively two carrying bolts between connection openings lower staple bolt up, the cable drum is equipped with the center pin, erect between the lower staple bolt of two earth anchor bases at the both ends of center pin. The device fits and constructs at the rural areas overhead line, and with the haulage vehicle of microtractor as the loading cable drum, the device simple structure, the assembly is swift, and convenient operation is ascending through adjusting nut, can make the improvement of staple bolt center, adapts to the cable drum of different diameters, not only reduces the equipment acquisition cost, still can guarantee the circuit and lay the quality, and labor-and time-saving is laborsaving, improves labor efficiency.