The machine adopts industrial computer control, screen display, imported double servo, three servo, four servo and other three systems, synchronous fixed length, photoelectric correction, two sets of frequency conversion speed regulation, automatic control of upper and lower heat sealing, and automatic rewinding of adjustable side materials , The batch number is output automatically. It has the advantages of reasonable structure, simple operation, reliable use, convenient maintenance, and high control precision. It is a good equipment for producing three-sided sealed bags.