Automatic cutter passing device of binding machine

An automatic cutter passing device of a binding machine comprises a mounting seat; the through cutter assembly is arranged on the mounting seat, and the through cutter assembly comprises a dredging rod which is vertically mounted and a dredging rod fixing seat which is used for fixing the bottom of the dredging rod; the lifting mechanism is used for controlling lifting of the mounting seat and comprises a sliding rod mounted on the binding machine and a power assembly for driving the mounting seat to move up and down, the mounting seat is mounted on the sliding rod in a sliding manner, and the power assembly is connected to the bottom of the mounting seat and provides power for the mounting seat to slide up and down. When paper is clamped in the bookbinding machine, the drilling tool can be quickly dredged only by installing the dredging device in the clamping groove, dredging operation steps are greatly reduced, operation of professionals is not needed, the professional requirement for the operators is lower