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为了探讨龙湖中重金属污染情况,测定了龙湖中9个取样点的重金属元素含量,并从中选取Mn、Cu、Pb、As 4种重金属元素进行水质评价。通过灰色关联评价分析,所采集的9个样点中有8个样点都属于Ⅴ类水质、1个样点属于Ⅳ水质。采用Hakanson潜在生态风险指数法对龙湖沉积物进行重金属潜在生态风险评价分析,4种重金属的潜在风险顺序为Cu〉As〉Pb〉Mn,其中每个样点的Cu元素都达到了极强的潜在生态危害,As元素的潜在生态危害程度都达到了强度生态危害。“,”In order to discuss the heavy metals pollution in the Long Lake,9 samples were collected from Long Lake in Zhalong Wetland.The content of Mn,Cu,Pb and As in the lake were measured by ICP-MAS.The heavy metals pollution was evaluated by the grey relation analysis.The results indicated that the correlation degree of 8 samples reached the five class standard,as well as the correlation degree of 1 sample reached the four class standard.Meanwhile,Hakanson potential ecological risk index was adopted to analyze and evaluate the heavy metal pollution.The order of potential ecological risk of the 4 kinds of heavy metals was CuAsPb Mn.Cu of all samples reached the strongest potential ecological risk,and As of all samples reached stronger potential ecological risk.