Ssp inversion based on ray arrival time difference in shallow water is presented and related algorithms are developed . the feasibility and practicability of the algorithms are studied by using the experimental data in the east china sea 提出了一种基于特征声线的到达时差反演浅海声速剖面的方法,推导和论证了到达时差反演浅海声速剖面的算法。