Based on measured data in storm waves, the suspended sediment content of silty coast water is uniform at the upper layer, with a sudden increase near the bottom, and is named as L-shaped vertical distribution. Flume experiments were carried out to study the characteristics of vertical suspended sediment content on the liquefied silty soil bed, which is made using Huanghe River Delta silty soil. It is revealed that the vertical suspended sediment content on the liquefied silty soil bed under wave action is L-shaped.According to the variation of the particle size and the experiment phenomena, the formation of the high content layer at the bottom was affected by the fine sediments entering into the water when the silty soil liquefied, and the suspended sediments in the upper water was kept by turbulent fluctuation.The dramatic increase of the water-sediment on the silty soil coast during stormy weather is preliminarily explained using wave-induced soil liquefaction point of view.