Anionic polyacrylamide series products are linearity of high soluble polymers in water. It is practically insoluble in benzene, ether, acetone and lipin and other organic solvent common and easily soluble in water. With flocculability, thickening, the performance of shear, the performance and the dispersivity, it is widely used in the extraction of the oil, the separation of minerals, washing of coal, metallurgy, chemical industry, papermaking, spinning, the manufacture of sugar, medicine, protection of the environment, building materials and agriculture industries.