Polysugar alcohol (Polysugaralcohol) is a new generation of sugar alcohol, refers to multiple hydroxyl groups, including short chain, medium chain sugar alcohol, and long chain sugar alcohol, is a wide range of sugar alcohol mixture, involving new materials, high-end food, daily chemical, modern agriculture, green chemistry, biotechnology, environmental protection and other emerging application fields. According to different molecular weight, it can be applied to different fields, such as low molecular weight can be applied to daily chemical, high-end food and other fields, medium molecular weight can be applied to modern agriculture, precision electronics and other emerging fields; high molecular weight can be applied to degradable materials.