This paper introduced the synthesis method and extraction performance research situation of two alkyl phosphonic acid at home and a-broad,discussed the preparation methods of oxidation hydrolysis and free radical generating method two kinds of two alkyl phosphonic acid,and analyzed the advantages and disadvantages of two methods,according to the existing problems of synthesis and its extraction performance research aspects of two alkyl phosphonic acid,put forward improvement suggestions.%介绍了国内外二烷基次膦酸萃取剂的合成方法以及萃取性能研究现状，论述了氧化水解法和自由基加成法两种二烷基次膦酸的制备方法，并分析了两种方法的优缺点，针对二烷基次膦酸的合成及其萃取性能研究方面存在的问题，提出了改进建议。
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