The purpose of this experiment is to study the heavy metal pollution degree in two kinds of aquatic plants, iris pseudacorus and sagittaria sagittifolia, and accumulation effect on heavy metal pollutants, and compare the iris pseudacorus and sagittaria sagittifolia's tolerance on Pb tailings exudated liquids with different contents and these two kinds of plants' ability of remediating pollution water body environment with Pb heavy metals tailings in hoping of seeking the new breakthrough for

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... phytoremediation technology in this paper. It is more difficult to degrade the heavy metal elements, and their toxicity is also very big. In addition, the heavy metal elements can also be accumulated and absorbed by the plants. Thus, the heavy metal elements enter the food chain and pose a serious threat to the healths of people, animals, all kinds of wild animals and other lives. Metallurgy, metal treatment, textile, paint, salt production, medicine, chemical industry, mining are the main source of heavy metal pollutants. Especially in mineral resource rich regions, once tailings, slags, toxic gases and industrial waste water, these industrial wastes with a lot of heavy metal pollutants, brought by mining operations are discharged into the surrounding environments, it will bring great harm to the healths of residents and other creatures in this region. In recent years, Dexing City, Jiangxi Province has been focused on economic development, and neglected environment protection. Because of special location of Dexing City, there are many lead mines in its territory. In the process of exploiting the mines, at the same time, Dexing people have neglected the treatment of discarded tailings so as to make tailings exudated liquids flow into the rivers to lead to that the residents living water and agricultural water contain a large amount of Pb and bring great harm to people's production and life. Therefore, we must find the plants with good tolerance and strong vitality and use these plants' self-remediation abilities and abilities of remediating the surrounding environment so as to relieve increasingly the serious ecological environment in mining regions, Dexing City, Jiangxi Province.