Heat shrink packaging machines are suitable for shrinking small products, and have the advantages of small size, small footprint, economical, and so on. It is suitable for far-infrared heat-shrinkable thin films such as POF, PVC, PP, POP, etc. The thickness of the shrink film should be in the range of 0.01-0.04 mm. Quartz heating tubes are located at the top, bottom, and sides of the shrink tunnel, the temperature of the shrink chamber and the speed of the conveyor belt are adjustable.