The utility model discloses a stay wire binding device which comprises a rotary rod provided with a handle, wherein a supporting plate is arranged at the end of the rotary rod, a guide ring is fixed to the inner side of the upper portion of the supporting plate, the axis of the guide ring is parallel to the rotary rod, and a locating ring is arranged between the guide ring and the handle. According to the stay wire binding device, since a stay wire is wound according to the lever principle, hand injuries caused by manual binding and damage to the stay wire caused by pliers are avoided, time and labor are saved, operation is simple and convenient, and work efficiency is greatly improved.