The automatic L-type sealing, cutting and shrinking packaging machine is an automatic and unmanned L-type sealing and cutting machine specially developed, produced and designed for packaging products of multiple specifications. It features automatic film feeding and punching, as well as automatic film sleeving, sealing and cutting. Only manual adjustment of the film guiding system and the feeding and conveying platform is required. It features thin and centered sealing lines, ensuring a flat and attractive packaging effect. It is suitable for products of different widths and heights, and is widely used for shrink packaging of large quantities of products in industries such as cosmetics, medicine, food, software, beverages, tobacco, daily chemicals, automobiles, cables, and electronics.