The utility model relates to an electric power device, in particular to a special tool for binding a tail wire of an electric power circuit tower stay wire. A winder arranged in rotatable mode through a hinge is fixed in the middle of a rod-shaped handle, the winder is C-shaped, one end of the winder is connected with the hinge, a fixing handle in a shape of a short shaft is fixedly arranged on the winder on one side opposite to the hinge, a rotatable fixing ring is arranged at the position on the handle opposite to the fixing handle, and a winding pin shaft is arranged on a plane on the winder perpendicular to the fixing handle. During use of the special tool, the tail wire of the stay wire, a main line and an iron wire for fixing are arranged in the C-shaped winder, the winder is located and locked through the fixing ring, the iron wire can be wound on the surface of the tail wire and the main line fast and evenly by rotating the handle, and the tool has the advantages of being convenient to use, low in labor intensity and the like. Simultaneously, winding of the iron wire is even, tension of the iron wire is uniform during winding, and effective fixing of the tail wire of the stay wire and the main line are guaranteed.