Abstract: In seasonally frozen regions, solidified soil is affected by freeze-thaw cycles and cyclic loads, leading to the deterioration of its mechanical properties and a reduction in bearing capacity. In this study, static and dynamic triaxial tests under freeze-thaw cycles are conducted to systematically analyze the attenuation behaviors of static and dynamic mechanical indices of solidified mucky soil under different freeze-thaw cycles, freezing temperatures, and thawing conditions. Combined with scanning electron microscope (SEM) tests, the structural damage mechanism of solidified soil under freeze-thaw cycles is revealed. The results show that with the increase of freeze-thaw cycles and the decrease of freezing temperature, the maximum attenuation rate of the secant modulus of solidified soil reaches 30.0%, and the maximum attenuation rate of strength is 35.4%. Under dynamic loads, the cumulative strain curves can be divided into two types: stable and failure modes. The critical dynamic strength decreases with increasing number of freeze-thaw cycles and decreasing freezing temperature, with a maximum reduction of 33.1%. Microscopic test results indicate that freeze-thaw action leads to an increase in the number and size of pores in the soil and weakens particle bonding, while cyclic dynamic loads cause soil structure reorganization and pore compression.