Cationic polyacrylamide is acrylamide aqueous solution, quaternary ammonium monomers, deionized water, and other materials, under certain conditions polymerization, and then after drying, grinding process of the formation of water-soluble polymers. Cationic polyacrylamide its molecular chain containing a certain number of polar groups, by adsorption of suspended solid particles, so that the bridge between the particles or by charge neutralization, the particles agglomerate to form large flocs. Cationic polyacrylamide having multiple reactive groups, with many substances affinity, adsorption to form hydrogen bonds, thereby accelerating the solid-liquid separation, filtration promoting effect. Water-soluble cationic polyacrylamide good, the same can be completely dissolved in cold water, add in the medication process less medication, compared with a small amount of product can be greatly flocculation, regular and aggregation * iron chloride polymerization companion , iron salts, etc. Meanwhile, the effect is remarkable name. Cationic polyacrylamide is mainly used for a variety of industrial and domestic sewage settling flocculation, sedimentation clarification treatment, sludge pre-concentration, sludge dewatering. For example: alcohol plant wastewater, brewery wastewater, monosodium glutamate factory waste water, sugar factory waste, meat plant wastewater, wastewater beverage plants, textile printing and dyeing wastewater treatment, municipal sewage treatment plant sludge thickening and dewatering.