Abstract: Clay is widely distributed in the coastal areas of South China, and it is often stabilized using solidifying agents. However, existing research lacks comprehensive investigations into the static and dynamic mechanical properties of soft soil before and after stabilization, as well as the interrelationships among key factors. Therefore, this study conducted a series of consolidated undrained triaxial tests to investigate the effects of the fly ash and lime-to-cement ratio (TR), curing ratio (CR), moisture content (w), and confining pressure (σ'3) on the static and dynamic mechanical characteristics of soft soil and stabilized soft soil. The experimental results indicate that the static mechanical properties of stabilized soil initially increase and then decrease with increasing TR, increase with confining pressure, and decrease with increasing moisture content. The dynamic elastic modulus of stabilized soil increases with increasing CR and confining pressure, while decreasing with increasing moisture content. Moreover, the damping ratio of stabilized soil decreases with increasing CR and confining pressure, but increases with increasing moisture content. The findings of this study provide a theoretical foundation for future research on the stabilization of soft soil.