The improved PET tear free film has been improved through scientific and technological innovation. The product has been coated with special treatment to change the molecular structure of the film and made into a composite film, which is smooth overall, has no gaps, and has strong sealing, and is not easy to be damaged by external forces or torn by mistake, resulting in package damage. Through repeated tests and experiments, the best value of the easy tearing treatment process was determined. After the composite film printing product was made, it could be torn by hand from any direction and position. The product is coated with corona, which makes the printing easier to attach, not fall off, and the font and color sense more comfortable, laying a foundation for mass production and packaging of various products.