Water medium dispersing type polyacrylamide(PAM) is the new generation of water treatment product.There are main two linds : cationic(cation) polyacrylamide(PAM) and anionic(anion) polyacrylamide(PAM). Compared with the traditional water treatment products, it has faster dissolve speed, higher efficiency, and more convenient use, no powder pollution and no secondary pollution. Up to now, we have developed by ourselves more than ten specifications of water-medium dispersing type polyacrylamide, and the product stability is quite excellent.