Paper packaging bag is a kind of container used to contain and protect commodities, which is processed by designing, printing, cutting, folding, gluing and other processes with paper as the main raw material. It is widely used in food, clothing, gifts, medicines, daily necessities and many other products in the field of packaging. Compared with plastic or other materials, paper packaging bag has the advantages of environmental protection, recyclable, degradable, lower cost, printing adaptability, etc. It can provide good printing effect, which is conducive to enhancing the attractiveness of product appearance and brand value. According to different needs, paper packaging bags can be made into various shapes and sizes, such as tote bags, valve bags, self-sealing bags, string bags, etc., and can be enhanced with waterproof and wear-resistant properties through lamination, varnishing and other processes.