Polyvinylamine is a kind of linear polymers polymer, and its products are mainly divided into dry powder and colloid. According to its average molecular weight, it can be divided into low molecular weight (; 7 million) three categories. According to its structure, it can be divided into nonionic, anionic and cationic types. The anionic type is mostly PAM water disintegration type (HPAM). There are a large number of amide groups in the main chain of polyacrylamide, which has high chemical activity and can be modified to produce many derivatives of polyacrylamide. Products have been widely used in papermaking, mineral processing, oil recovery, metallurgy, building materials, sewage treatment and other industries.