The application of chelating agents on remedying the soils contaminated by heavy metals is un-safe because non -biodegradable ones can cause secondary pollution to surface water and groundwater .The strict environmental regulations promote the global enterprises to produce safer biodegradable chelating agents to replace the widely used non -biodegradable once such as EDTA and DTPA .In this paper , some new bio-degradable chelators, such as GLDA, IDSA, AES, EDDS and NTA were introduced, and their application effects and the main achievements on remedying the soils contaminated by different heavy metals were summa -rized;at last , the research directions in future were prospected .%螯合剂应用于重金属污染土壤的修复存在安全隐患，由于使用不可降解螯合剂会造成地表水和地下水的二次污染，严格的环保法规促使全球企业生产更为安全的生物可降解螯合剂，以代替现在广泛使用的EDTA和DTPA等非生物降解型螯合剂。本文介绍了一些新型生物可降解的螯合剂包括 GLDA、IDSA、AES、EDDS和NTA等，综述了这些螯合剂在重金属污染土壤修复方面的应用，总结了现阶段可降解螯合剂在重金属污染土壤修复应用研究中的主要成果并对今后的研究方向进行了展望。
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