Efficient water-based coatings thickener mostly belongs to the hydrophilic polymer, according to the source are classified as animal, plant, mineral, synthetic or semi synthetic. Simple points can be divided into two categories, natural and synthetic. Most natural products from plants and algae containing polysaccharide viscous matter production, such as starch, pectin, AGAR, gelatin, algae fat, carrageenan, dextrin, tragacanth gum, polysaccharide derivatives, etc.; Finished product with methyl cellulose, carboxymethyl cellulose, cellulose derivatives such as polyanionic cellulose, starch derivatives, casein, sodium polyacrylate, polyethylene oxide, polyvinylpyrrolidone, polyvinyl alcohol, low molecular polyethylene wax, such as polyacrylamide. Thickener is divided into: water-based thickening agent, oil thickening agent, thickening agent, acid basic thickener. It is divided according to the purpose. Thickener is a lot of more phyletic, except to consider when the choice products of liquidity, transparency, consistency, gels and aerosols ability outside, still should pay attention to choose less dosage and thickening effect is good, it has good compatibility with body composition and does not produce phase separation, storage, not cause mildew and segregation of water-soluble compounds.