This paper described the plateau lake-Fuxian Lake and its buffer zones in Yunnan province ,calculated the pollutant production quantity,discharge quantity and the lake inflow quantity of buffer zones,analyzed the main environmental problems and put forward the treatment program.Analysis results showed : rural domestic sewage and agricultural non-point source pollution had becomemain pollution sources inbuffer zones.The lake inflow quantity of COD,TN,TP,and NH3-N were 578.89 t/a,120.61t/a,13.04t/a and 43.64t...