Abstract: Submarine silt soil is prone to be liquefied under external dynamic loads such as waves. This study conducted dynamic triaxial tests to compare the cumulative dissipated energy of submarine silt in its state as post-liquefied silt and in its natural state from the Yellow River subaqueous delta. Then we assessed the impact of clay particle content, effective confining pressure, and cyclic stress ratio on the cumulative energy dissipation during liquefaction of the submarine silt, thereby identifying the key factors influencing its liquefaction characteristics. The results showed that both clay particle content and effective confining pressure significantly affect the cumulative dissipated energy during the liquefaction of submarine silt. As the clay particle content increases, the liquefaction energy dissipation of the soil samples initially decreases and then increases, with a critical point in the range of 15%-20% for clay partical content. The critical point of clay particle content in the post-liquefied silt is lower than that in the natural state of submarine silt, and the variation in liquefaction energy dissipation due to changes in clay particle content in the post-liquefied silt is more pronounced than that in the natural silt. The energy dissipation increases with the effective confining pressure; for the natural state of submarine silt, the energy dissipation at a confining pressure of 30 kPa is twice that at 20 kPa, and at 40 kPa, it is three times that at 30 kPa. The energy dissipation in post-liquefied silt is higher than that in the natural state of submarine silt, with the enhancement effect being more pronounced at lower effective confining pressures. The impact of the cyclic stress ratio on energy dissipation is relatively small; however, the critical cyclic stress ratio required for re-liquefaction of the post-liquefied silt is about twice that of the natural state of submarine silt.