<p>In cold regions, slope pemmafrost distributes widely. Steep slopes and solar exposure differences cause non-uniform temperature fields, forming ice lenses with varying inclinations and thicknesses that enhance permafrost anisotropy and affect mechanica properties. This study conducts triaxial tests on frozen silty clay with ice lenses under different temperatures, inclinations, thicknesses, and confining pressures, obtaining deviatoric stress-strain curves. The results indicate that the morphology of these ice lenses does not significantly alter the failure pattern of frozen soil. The inclination of ice lenses has a noticeable weakening influence on frozen soil strength. Under identical soil temperatures, an increase in the inclination angle of the ice lens correlates to a reduction in the frozen soil’s compressive strength. Furthermore, the thickness of ice lenses contributes positively to enhancing the strength characteristics of frozen soil; specifically, specimens with thicker ice lenses exhibit higher compressive strengths. As confining pressure increases, so too does the influence exerted by thick ice lenses on compressive strength also becomes increasingly significant. As we observe changes in inclination angles among these ice lenses, both cohesion and internal friction angles within frozen soil are found to diminish. Notably, while reductions in internal friction angles are relatively modest and display linear trends, cohesion experiences substantial declines—particularly pronounced within frozen soil characterized by thicker ice lenses.An empirical formula for the compressive strength of frozen soil considering the temperature of frozen soil and the inclination of ice lenses is given, comprehensively revealing the impact of ice lenses on frozen soil’s mechanical characteristics.</p>