Cationic polyacrylamide is a copolymer consisting of a cationic monomer and acrylamide. It is a water-soluble linear high-molecular organic polymer with a wide range of properties and applications. Due to its presence of various reactive groups, it can form affinity adsorption and hydrogen bonds with many substances. It is mainly used to coagulate negatively charged colloids and has functions such as clarification, color removal, adsorption, and adhesion. It is suitable for industries such as dyeing and printing, papermaking, food processing, construction, metallurgy, mineral processing, and coal washing. In the process of oil extraction and processing, it is used to improve oil recovery and treat oil-containing wastewater.