BS4020-type heat shrinkable packaging machine using quartz far-infrared heating tube, automatic temperature control electronic Promise, the attitude of relay control, stable and reliable, low noise, long life. Suitable for multiple items wrapped tightly. BS4525 type adopts corrugated pipe heating, under the circulating hot air structure, the height of the furnace can be freely adjustable, adjustable louvers on both sides, equipped with intelligent temperature control, AC speed regulation, shrink more quickly and thoroughly. After packaging the product can be sealed, moisture-proof, anti-impact, suitable for multiple items wrapped tightly. Suitable for all kinds of shrink film such as PVCPPPOF.