Abstract: The wave-induced liquefaction of submarine sediment is a key issue to coastal engineering. Referring to the discrimination of sandy soil liquefaction caused by earthquake, the discrimination of submarine silty soil liquefaction is divided into two steps, i.e. primary discrimination and secondary discrimination in this paper. The critical ratio of cyclic stress, which leads to the liquefaction, is the criteria for primary discrimination, using soil basic features and wave conditions as parameters. Wave-induced shear stress of sediment is compared with the shear strength of sediment in the secondary discrimination. Combined with available research result, specific discrimination method for wave-induced liquefaction is presented in this paper.