Packaging bag length fixing mechanism for bagged medicament boxing production line

The invention discloses a packaging bag length control mechanism for a bagged medicament boxing production line, and relates to the field of medicine processing, the packaging bag length control mechanism comprises a medicament bag conveying belt, a medicament box conveying belt and a pushing mechanism, side protection plates are arranged on the two side edges of the medicament bag conveying belt, and openings are formed in the positions, close to the output end of the medicament bag conveying belt, of the two side protection plates; the two openings horizontally correspond to each other in the width direction of the medicine bag conveying belt and are a pushing opening and a discharging opening respectively, a vertically-arranged baffle is arranged at the discharging opening, an independently-arranged lifting air cylinder is arranged on the lower portion of the baffle, the lifting air cylinder is axially vertical, and the output end of the lifting air cylinder is fixedly connected with the baffle. The pushin