近年来，Lamb波被越来越多地用来对大面积的层状复合材料进行无损评估。本文借鉴以往经验，介绍用Lamb波的零阶对称模式（S0模式）的反射，来研究它对层状复合材料缺陷的反应，通过对一系列信号的辨别和分析，得出一种用Lamb波进行无损检测的有效方法。 In recent years, Lamb waves have been increasingly used to nondestructively evaluate large areas of layered composites. Based on the previous experience, this paper introduces the reflection of Lamb wave zero-order symmetry mode (S0 mode) to study its response to the defects of layered composites. Through the discrimination and analysis of a series of signals, An effective method of non-destructive testing.