Binding device

The utility model discloses a bridle device which comprises a bridle assembly, the bridle assembly comprises a guide wheel and a bridle frame arranged at the top of the guide wheel, wheel shafts are fixedly arranged in the middles of the two ends of the guide wheel, and the wheel shafts are used for movably connecting the guide wheel with the bridle frame. A buffering assembly is further arranged on the side, away from the guide wheel, of the bridle frame. And the guide wheel is movably connected with the buffer assembly through a wheel shaft. The sliding block drives the guide wheel to be tightly attached to cut paper under the action of the spring, when the guide wheel moves to the edge of the cut paper, the sliding block moves upwards through the supporting rod under the action of the protrusion of the edge, the guide wheel is prevented from crumpling the edge of the cut paper, meanwhile, the guide wheel can be tightly attached to the edge of the cut paper, and when the guide wheel moves to the paper cutti