The touch-sensitive man-machine interface, regardless of fine-tuning, correction, including cutting length, can be easily controlled with one hand. Alarms and operating status can also be displayed on the screen instantly; the machine can automatically slow down as the paper roll becomes smaller. The machine will stop automatically when there is no material to ensure the operation of the machine is more stable; the big wheel and the paper clip are formed at one time, with higher precision, to ensure that the bottom of the paper bag is sharper, and the bag shape is more square and tidy.