The machine has high speed and efficiency, and is suitable for manufacturing cylindrical plastic natural color and color-printed vest bags (T-shirt bags). It uses advanced photoelectric eyes for tracking to make the printing pattern position precise without error, sealing and hot cutting are synchronously carried out without any tension, the sealed bottom is firm and beautiful. Variable frequency speed regulating motor is equipped to realize multiple automatic protection functions such as energy conservancy, overvoltage and over-current protection. In addition, automatic counting device is provided to freely set the binding quantity, and automatically discharge and reset after bags are piled to the set quantity.