《尔雅》是我国训诂学的早期重要成果。从《尔雅》的内容看 ,训诂学所研究的内容、方法、术语、条例等 ,大都可在这里找到它发展的源始。考察《尔雅》 ,在《释言》部分出现了一些同一释条中用不同词来解释同一词的现象 ,其中既有义项之训又有义素之训 ,这一训释方法是传统训诂学理论无法涵盖的。文章将这种训释方法称为同词异训 ,试图从《尔雅》中较特殊而又有规则的“A ,B也、A ,C也”这一形式出发 ,结合现代语义学的有关理论 ,探讨其同一训释条例中同词异训的训释方法与特点。 “Erya” is an important early achievement of our country’s scholarship. Judging from the content of “Erya”, the contents, methods, terms, regulations, etc. studied by Exegetics can be found in the beginning of its development here. In the section of “Explanations”, there are some phenomena that different words are used to explain the same word in the same interpretation. Among them, there are not only the training of meaning and the training of righteousness, but also the interpretation of traditional wisdom Theory can not be covered. The article calls this method of explanation and explanation as the same word and different meanings, trying to start from the special and regular “A, B, A, C also” in Erya, combining with the modern semantics Theory, to explore its interpretation of the same interpretation of the same word training methods and characteristics.