<p>The subgrade clay experiences cyclic dynamic loads from passing vehicles and intermittent stages when no vehicles are present. In this study, the deformation characteristics of freeze–thaw silty clay in the Xining subgrade under intermittent stages/cyclic loading were analyzed by dynamic triaxial test considering different loading patterns. The results show that the deformation of silty clay increases as the cyclic dynamic stress ratio (CSR) increases. Additionally, the deformation further increases as the freezing temperature decreases. Furthermore, the intermittent stage facilitates partial recovery of axial strain. Pore pressure, which show hysteresis compared to axial strain, are governed by the degree of freeze–thaw deterioration and stress state. By combining the time hardening method with multiple regression analysis, a deformation prediction model that incorporates freeze–thaw cycles and intermittent stages is proposed, and model predictions closely match experimental results. An evaluation method to quantify the intermittent behavior is established, which focuses on analyzing deformation evolution during the intermittent stage and reveals how pore pressure regulates axial strain. This study can provide a theoretical reference for settlement prediction under traffic loads and long-term performance assessment of subgrade engineering in cold regions.</p>