The application of polyacrylamide in water treatment industry mainly include raw water treatment, sewage treatment and industrial water treatment. In the treatment of raw water, polyacrylamide and activated carbon can be used together for the condensation and clarification of suspended particles in domestic water..Polyacrylamide can be used for sludge dewatering in sewage treatment also as a formulation agent In industrial water treatment.Organic flocculant polyacrylamide is used instead of inorganic flocculant for raw water treatment and the water purification capacity can be increased by more than 20% .It can be the most effective in industrial wastewater especially for suspended particles, coarse, high concentration, particles with positive electric charge, water PH is neutral or alkaline sewage, steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater and other sewage treatment. Polyacrylamide can increase the utilization rate of water recycling in sewage treatment industry.