The water-soluble film is made of water-soluble polymer materials that can quickly dissolve in water, and is made through a specific film-forming process. It is a novel and biodegradable green packaging material that is water-soluble. In addition to water solubility, polyvinyl alcohol (PVA) also has the characteristics of good density, high crystallinity, and strong adhesion. The film made from it is not only flexible, smooth, and non charged, but also resistant to oil, solvents, wear, and gas permeability. PVA film is a product with high technological content and added value. Whether it is in the selection of raw materials, processing, or consumption process, it does not release toxic or harmful substances, which is conducive to environmental protection and achieving green consumption. It is an environmentally friendly product.