Coated paper is a composite material made by coating plastic particles on the surface of paper by tape casting machine. There are many kinds of film-coated paper products, and food-grade film-coated paper is an important application field. Food-grade coated paper usually uses polyethylene PE film, polypropylene PP film and polyethylene terephthalate PET film as raw materials, and is coated on the paper surface by a tape casting machine. There are many domestic coated paper producers, among which food-grade coated paper producers include Wuxi Good World Technology, Tianjin Gloria Packaging, Wuzhou Special Paper, Guangdong Fenghua Paper, Shandong Middle-class Paper, etc. The food-grade coated paper market is mainly distributed in the developed areas of catering industry and food processing industry, such as East China and South China. China's food-grade coated paper industry has a large scale, and its production capacity meets the domestic market demand and is also exported to overseas markets such as Southeast Asia. However, domestic food-grade coated paper is mainly low-end products, and some high-end products still need to be imported from Europe and America.