The back-sealed lapel type packaging form has the operation data and adjustment displayed intuitively on the screen. The photoelectric control device is directly installed to ensure the completeness of the packaging bag pattern. It automatically completes bag-making, metering, filling, sealing, cutting, counting, and batch number printing. An inflation device can be added. The shell and the parts in contact with the material are made of stainless steel. The machine is driven by electricity and gas. A separate air compressor is required for use