Paper water treatment defoaming agent is mainly used in pulp and paper production from the paper industry. The main components in this process are lignin, cellulose, volatile organic acid, etc., with high concentration of pollutants, large emissions, difficult to degrade, poor biodegradability and other characteristics, is one of the more difficult to treat industrial wastewater.The common treatment method of papermaking wastewater is coagulation method, which has strong adaptability, simple equipment and convenient operation, but has such disadvantages as high cost and large sludge production capacity. Another method is the biological method, which has the characteristics of no secondary pollution and low treatment cost, but cannot completely reduce the content of organic pollutants. In recent years, domestic and foreign scholars have studied the application of talc as coagulant aid, coagulant aid and filter aid in the treatment of papermaking wastewater defoaming agent.