Cationic polyacrylamide is a water soluble polymer polyelectrolyte, non-toxic, odorless, easy to absorb moisture, soluble in water, not soluble in ethanol, acetone and other organic solvents. Molecular chain of this product has a good stretch performance and this product has good elasticity, stable relative molecular mass, uniform charge distribution, rapid in generating flocculation, rapid separation speed, compact flocculation, high strength and good dehydration.