As a synthetic water-soluble polymer compound, VP has the general properties of water-soluble polymer compounds, such as colloid protection, film-forming, cohesiveness, hygroscopicity, solubilization or cohesion, but it is the most distinctive and therefore subject to People pay attention to its excellent solubility and physiological compatibility. Among synthetic polymers, it is rare that PVP is soluble in water and most organic solvents, with low toxicity and good physiological compatibility, especially in medicine, food, cosmetics, which are closely related to people's health. In the field, with the reduction of the price of its raw material butyrolactone, it will show a good prospect for its development.