It is a new type of environmental protection packaging material that can be rapidly degraded by natural factors (H2O) through special process. It can be rapidly denatured, decomposed and degraded into low molecular compounds by natural factors (H2O), and has the function of improving land. Therefore, it belongs to a new type of environmental protection packaging materials. In Europe, America, Japan and other countries are recognized by the environmental department. Because of its environmental protection characteristics, it has been widely valued by developed countries in the world. Water soluble film has been widely used in the packaging of pesticide and chemical industry in foreign countries. With the development and progress of society, people pay more and more attention to the protection of our living environment, especially after China's accession to the WTO, it is in line with the developed countries in the world, the environmental protection requirements of packaging are increasing day by day, and the application prospect of water-soluble packaging film in China is broad.