Water Soluble Film is a new type of environmentally friendly packaging material that is processed by special technology and can fully biodegradable in water.It can be rapidly denatured,decomposed and degraded into low-molecular compounds by itself through the action of nature factors,and has the effect of improving the soil.Therefore as a new type of environmentally friendly packaging material,it has been recognised by the environmental sector in America,China,Europe,India and other countries.