Abstract: The variety of the count of chemical fertilizer and the course of lake eutrophication were analyzed in this paper.h were posted that the increasing amount of pollution from agricuhural non-point sources and the depravation of water body pollution were isoehronously nearly ,and the pollution from agricultural non-point sources was the main factor causing water body pollution.The Long-term and hardship of the prevention and cure of the pellution from agricultural non-point sources were pointed out through the agricultural non-point source＇s large loading,complexity and difficulty.In the last,the establishment of the pelicy and code of the prevention and cure of the pollution from agricultural non· point sources, the pepularizatiou of advanced technology, and the strengthening ecological rehabilitation were the main countermeasures for the prevention and cure of the pollution from agricultural non-point sources.