Organic flocculants flocculating effect refers to the natural or synthetic organic molecules. Natural products as protein or polysaccharide compounds, such as starch, protein, animal glue, alginic acid sodium, sodium carboxymethyl cellulose, etc.; The synthetic products are polyacrylamide, sodium polyacrylate, polyvinyl pyridine salt, polyethylene imine, etc. This type of flocculant (coagulant) is water-soluble linear polymer material, most can be ionized in the water, for polymer electrolytes. According to their characteristics, can be dissociation groups can be divided into Yin, cationic and amphoteric classes; Can produce the chain molecules bond bridge role, charged groups on the molecular diffusion layer of micelle electrification and the effect of compression. Because of the high polymer coagulant price is higher, often used for special purposes, such as high concentration, high turbidity and high chroma and special smell and wastewater treatment. Cationic high polymer flocculants application wide, the more rapid development.