The stable effect of lead (Pb), cadmium (Cd), arsenic (As) on the heavy metal polluted soils in Chenzhou Hunan with a novel stabilizer of TMT-ferric sulfate are investigated. The results show that the removal rate of the available contents of Pb , Cd in soil is higher than 60 % with the single use of TMT (aqueous solution containing 15 %TMT)as stabilizer, but there is no stable effect on As; the removal rate of the available contents of Pb, Cd in soil is higher than 90 % when TMT-ferric sulfate is used as stabilizer with 35.7 g/kg ferric sulfate and 0.1 L/kg TMT. The available contents of Pb , Cd decreases with the increase of soil water content. The available contents of Pb, Cd decrease more than 80 % and As 60 % with 35.7 g/kg ferric sulfate, 0.04 L/kg TMT and the soil water content is 70%of field capacity lasting 60 days.%以新型TMT（三巯基均三嗪三钠盐）-硫酸铁复配混合物为化学固定剂，考察了其对湖南郴州某重金属污染土壤中铅、镉、砷的固定效果.结果表明，单一使用TMT（含15%（质量分数）TMT的水溶液）为固定剂时，土壤中的有效态铅、镉去除率高于60%，但对砷没有固定效果.使用TMT-硫酸铁复配固定剂时，控制硫酸铁投加量为35.7 g/kg，TMT投加量为0.1 L/kg时，有效态铅、镉去除率达到90%以上.随着土壤含水量的增加，土壤中有效态铅、镉的含量显著降低.当控制硫酸铁投加量为35.7 g/kg，TMT投加量为0.04 L/kg，控制土壤含水量至田间持水量的70%，固定60 d，有效态铅、镉的去除率在80%以上，有效态砷的去除率可达到60%.
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