Pre-made bag packaging machine, its application range is extremely wide, low loss of packaging materials, the use of pre-made bags, packaging bags pattern perfect, sealing quality is good, thereby improving the product grade. Can also be used in a machine, just according to different materials supporting different metering devices can achieve particles, powders, blocks, liquids, soft cans, toys, hardware and other products of automatic packaging, pre-made packaging machine to improve product packaging efficiency, efficient work, cost savings.