The double layers bag making machine is suitable for making PE vest bags(supermarket handbags), flat bags(for clothes and shoes), disposable medical packing bags and bags for sanitary napkins.1. The vest bag making machine adopts microcomputer control and material-pulling by stopping motor. (Servo motor control system available for option).2. Arbitra fixed-length, accurate and stable step photoelectric control feeding.3. Automatic counting and set table counting alarm.4. Automatic constant temperature makes the sealing of bag opening firm and smooth.