Cationic polyacrylamide flocculants are mainly used in industrial solid-liquid separation processes, including precipitation, clarification, concentration and sludge dehydration. Mainly used in industrial and urban sewage treatment, paper industry, food processing, petrochemical industry, metallurgical industry, mineral processing, printing and dyeing industry, sugar industry and various industrial wastewater treatment. It is used to treat sludge settling and sludge dewatering processes in municipal sewage, meat, poultry and food processing wastewater. It can promote the aggregation of colloidal particles into large flocculation and suspension separation by neutralizing organic colloids and polymers with negatively charged and positively charged groups in sludge. The effect is obvious, reduce the dose.