The invention provides a gilling machine coiler tensioning device. The gilling machine coiler tensioning device is mounted inside a coiler; the coiler comprises a driving wheel, a coiler can and a canframe; the gilling machine coiler tensioning device comprises a first tensioning wheel, which is tightly attached to a flat belt and provided in a penetrated mode with a first connecting shaft in theaxial direction, the upper end of the first connecting shaft is provided with threads, and the first tensioning wheel can rotate horizontally relative to the first connecting shaft; the upper end ofthe can frame is provided with a first bar-shaped hole, and the upper end of the first connecting shaft extends out of the first bar-shaped hole and is fixed through a first nut; the side end of the can frame is provided with a first threaded hole, inside which a first bolt is arranged in a penetrating mode, and one end of the first bolt abuts against the first connecting shaft. The gilling machine coiler tensioning device can solves the problem that existing gilling machine coiler tensioning devices are unsteady in tension and a first tensioning wheel is prone to loosening to result in largetension fluctuation, accidental traction and influence on yarn evenness of subsequent machines.