Abstract: Abstract: Agriculture Non-point Source Pollution have become the main factors to pollute water, and the proportion in all of the water pollution also increased gradually. Farming has also turn into the main pollution source, and its main pollutants are nitrogen and phosphor. The most important and difficult problem to prevent and cure water pollution is to control Agriculture Non-point Source Pollution, because of its randomicity, uncertainty of pollutants releasing and approach and space-time difference of pollution charge. Therefore, it was necessary and important to review the Agriculture Non-point Source Pollution and its control to the Watershed Plateau in low latitude emphatically, including the loss pathways of N and P, their forms in loss process, characteristics and influencing factors.