The series of anionic polyacrylamide products are high-degree, water-soluble linear polymers, which are soluble in water easily and hardly soluble in general organic solvents such as benzene, diethyl ether, lipids and acetone. They have many valuable properties like flocculation, thickening, shear resistance, reducing resistance and dispersion. For that, it is widely used in oil recovery, mineral processing, coal washing, metallurgy, chemical industry, paper-making, textile, sugar industry, medicine, environmental protection, building materials and agricultural industry, etc.