Polyquaternium flocculating bactericide is a strong cationic polymer with good solubility in water. It is a non-oxidizing bactericide flocculant with broad-spectrum and high efficient bactericidal and algaecidal ability, which can effectively control the propagation of bacteria and algae in the water and the growth of slime, and has good slime stripping effect and certain dispersion and penetration, and at the same time, it has a certain de-oiling and deodorizing ability and corrosion inhibition effect. Widely used in petroleum, chemical, electric power and other industries in the circulating cooling water system, used to control the circulating cooling water system bacteria and algae breeding, to kill E. coli has special effects. Polyquaternary ammonium salt fungicide flocculant can be used as fungicide and anti-mildew agent in textile printing and dyeing industry and softener, anti-static agent, emulsifier, conditioning agent, etc. It can also be used in washing and chemical industry as surfactant and so on.