Assessment of heavy-metal contamination in soil of the lead and zinc smelting area in western Guanzhong was conducted respectively by the method of geo-accumulation index and ecological risk index.The result revealed that both of the methods could make a scientific assessment of contamination caused by human and get similar conclusions.The soit is heavily polluted by cadmium,moderately polluted by lead,and lightly pollnted by copper and zinc.Both of the assessment methods are based on sedimentology theory,but they have different emphases,they are both reasonable in assessing heavy metal polhtion.However,they have limitations.The parameters should be corrected before assessing.%采用近年常用于重金属污染的地积累指数法及生态危害指数评价法对关中西部某铅锌冶炼区表层土壤中重金属污染情况进行了评价.结果表明,两种方法均能对人为污染行为作出较为科学的评价,且两种方法可得到相似的评价结果:该冶炼区周边土壤Cd元素为中重度污染,Pb为中等污染,Zn和Cu为轻微污染.生态危害指数评价法和地积累指数评价法两种方法都是基于沉积学理论提出,两者各有侧重点,对于重金属污染的系统评价各具合理性；但在对土壤重金属污染进行评价时,有一定的局限性,建议在修正其参数后综合应用.
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