It is suitable for doing compound film of three-sides (standing bag, embossing bag)medium-sealing bag, which makes the bag-making procedure working successively. Furthermore, it adopts double photo-electric dviation correcting system, micro-computer controller, color screen display, out-set machinery transmission device, pneumatic blade and hole punching, imported frequency governor, double-step pull, photoelectric tracking as well as double sending and ironing advantages, along with the convenience of operation, accurate fixed position, reliable quality.