Designed and developed by assimilating the foreign technologies, this machine adopts LDPE/HDPE as raw materials to make ribbon-through garbage bag or BOPP/PP flat-open bag. It is featured with computer-control, photocell tracking, automatically temperature-control, automatically counting and alarming. Meanwhile, it can also finish edge-folding, mouth –forming, ribbon-through and perforating at one step, which guarantees that firm, regular and nice mouth and side sealing can be achieved. Furthermore, it can be specially designed for making continuous-winding bags. With optional functions like multi-folding and dotting, it is an ideal supporting equipment for bag making machines.