Abstract: Seabed sediments experienced consolidation, liquefaction and fluidization, erosion and deposition under cyclic loading of waves, together with the dynamic variation process of sediment composition, structure, physical-mechanical properties, and engineering geology properties. Single process can affect others, and in the dynamic process of coupling interaction, waves post-reformed the seabed sediments in cycles. This paper summarized the domestic and international research progress of sediment dynamic responses to waves systematically, and discussed the critical role and mechanism of waves in the post reformation of silty sediments from the aspects of pore water pressure responses of seabed sediments, variation of sediment strength, physical-mechanical properties, and sediment composition and structure. Taking silty sediment dynamics to waves in Yellow River delta as foothold, findings of physical modeling experiment, in situ observation, and mathematical calculation methods on wave-soil interaction was demonstrated in detail to provide guidance to further study estuarine and coastal sediment dynamics.