Papermaking wastewater treatment refers to the treatment of wastewater generated in the papermaking industry. Papermaking wastewater mainly comes from the two production processes of pulp and papermaking in the paper industry. 1, Pulping is to separate the fiber from the plant raw material into pulp, bleaching into pulp; 2, papermaking is the slurry dilution, forming, pressing, drying, copying, processing into paper. Pulping, papermaking discharge large amounts of wastewater. Pulp wastewater, the most serious pollution. Drainage effluent was washed dark brown, known as black water, black water, high concentrations of pollutants, BOD up to 5-40g / L, contains a lot of fiber, inorganic salts and pigments. Wastewater from the bleaching process also contains a large amount of acid-base material. Papermaking machine discharge of waste water, known as white water, which contains a lot of fiber and added in the production process of fillers and compounds. Paper industry is a heavy industry, environmental pollution, pulp and paper production process water consumption, papermaking wastewater mainly from the paper industry in the production of pulp and paper two production processes. 1, Pulping is to separate the fiber from the plant raw material into pulp, bleaching into pulp; 2, papermaking is the slurry dilution, forming, pressing, drying, copying, processing into paper. Papermaking wastewater treatment and recycling of waste resources is the key to solving the pollution of the entire paper industry. At present, the economy of our country is developing rapidly and the intensity of environmental protection is constantly increasing. The total amount of pollution control policies such as pulp and paper manufacturing, printing and dyeing and electroplating are strictly implemented in the heavily polluting industries. The state environmental protection policies advocate clean production technology and circular economy policies.