AAA式是现代汉语中常见的一类重叠结构，但是并不是所有词类重叠构成的AAA式都与它的基式A表示相同的意义。本文以AAA式重叠结构为研究对象，根据其语法意义是否改变将其分为了两大类，AAA1类（语音重叠类）和AAA2类（形式—语义重叠类），分析了它们在句子中的分布情况，最后参考冯胜利和施春宏的“三一语法”理论框架，对AAA式重叠结构从结构、功能和典型语境三个方面进行探究。

AAA is a common kind of overlapping structure in modern Chinese, but not all AAA forms of overlapping words have the same meaning as its base A. This paper focuses on the AAA-type overlapping structure and divides it into two categories:AAA1 class (speech overlap class) and AAA2 class (form-semantic overlap class), according to whether its grammatical meaning has changed,and  analyzes its distribution in the sentences. Finally, this article refers to the theoretical framework of  "Trinity grammar" proposed by Feng Shengli and Shi Chunhong ,analyzes the AAA overlapping structure from three aspects of structure, function and typical context.