This paper, from the view point of ecology, thoroughly analyses the surface source pollution of lakes, points out the crux of lake surface source pollution is the issue of resource utilization. So that the author suggests that in lake areas and lake water resource regions the construction of agricultural ecological projects should be carried out so as to reduce resource consumption and minimize pollutant discharge thus attain the goal of lake surface source pollution control and prevention. This paper also introduces the general procedures and major construction research contents of the agro-ecological project in Liuminying Village, Beijing and the large-scale eco-farming construction in Shengli Oil Field, and particularly introduces the significant role of agro-ecolog-ical construction project in economic development, environmental improvement, reducing of fertilizer and pesticide consumption, soil pollution elimination, control and prevention of surface source pollution.