沿着CS 理论的发展历程介绍了CS 理论框架, 给出了其严格的数学描述, 着重讨论了对原始信号的重构技术, 最后介绍了一些可能的应用。-This paper introduces the theory framework of CS, gives its strict mathematic descr iption,focuses on the reconstruction of the original signal,and finally describes some possible applications.