This fully automatic paste packaging machine features a round hopper with a heating and stirring system, a back-seal sealing mechanism, and a built-in coding device for fully automated packaging of viscous products. The heating and stirring system keeps the paste material at a consistent temperature and prevents sedimentation or solidification during the packaging process. The back-seal sealing mechanism produces sturdy and secure bags suitable for larger portion sizes. The integrated coding device prints dates, batch numbers, or other information directly onto the packaging film during the process. The machine is equipped with a microcomputer control panel for easy adjustment of bag length, filling volume, and sealing temperature. The stainless steel construction ensures durability and hygiene, making it suitable for food-grade and pharmaceutical-grade applications.