Features: 1) Adopted with micro-computer to control, man-machine interaction, touch-screen to operate, simplicity and convenience 2) Stepping motor to locate system with double sending performance 3) The length of bag made with digital design, convenient adjustment 4) With automatic counting, electrostatic elimination, stepless regulator, etc. 5) According to customers' requirement, the device of punching hole and tearing device can be increased. It can produce cubic bag, zipper bag, etc.