Abstract: The Le′an River is one of a number of rivers flowing into Poyang Lake. The Dexing Mineral Factory which located near the Le′an River is one of the largest mineral factories in our country and is the main pollutant source of heavy metals in the Le′an River and Poyang Lake . A survey on the contents of heavy metals in water,sediments and aquatic plants was conducted to evaluate the contamination of heavy metals. The heavy metals such as Cu、Zn、Pb、Cd and their compounds were determined.The results indicated that the water in the investigated areas was not contaminated by heavy metals，and the water quality meets to the first evaluation criterion of surface water. But the content of heavy metals of Cu、Pb、Zn in sediments and soils are relatively high.And different plants have different selective enrichment of heavy metals .The enrichment coefficient was correlated to the background of heavy metals in soils,the higher concentration of heavy metals in soils,the more enriched of heavy metals in aquatic plants.

Key words: Poyang Lake, waters, sediment, aquatic plant, heavy metals pollution, evaluation