Abstract: In the 1990s a great interest to PAMs agricultural use was renewed to arouse with the development of the advanced PAM(very high molecular weight anionic PAMs) and the new application strategies(at very low rate via irrigation water),which makes it possible to reduce the cost and increase the benefits for practical agricultural use. Nowadays, the use of PAM was issued a western states interim conservation practice in the USA. In the late of 1980s PAM was introduced into China, however, has not been adopted for agricultural use because of high cost and some other problems. Research on the new PAM used in agriculture is also being given reconsideration. Studies at home and abroad showed that the use of PAM could provide soil and water conservation,ingation, efficiency, crop production, and environmental and economical benefits. Use of soil conditioner PAM shows promise in protecting soil and water from erosion.