本文采用弹性波在半无限空间介质中传播的基本原理和地壳波浪运动学说对大陆边缘地壳的构造进行了探讨,解释了不同类型大陆边缘地壳构造特征及其形成原因。特别对活动大陆边缘的海沟和岛孤的形成进行了定性的计算,同时,还对大西洋型和太平洋型两种大陆边缘进行了分析,探讨了它们相互关系和在地质发展历史中的演化过程。 In this paper, the basic principles of the propagation of elastic waves in a semi-infinite space medium and the theory of crustal wave motion are discussed. The structure of the continental margin crust is discussed. The crustal tectonics and their formation reasons are explained. In particular, the qualitative calculation of the formation of the trenches and island solitary margins on the active continental margin was conducted. At the same time, the two continental margins of the Atlantic and Pacific Oceans were also analyzed, and their mutual relations and the evolution in the geological development history were discussed.