Abstract：There are responses of slope under long-term cyclic load，and the degradation of mechanical capability of slope soils causes the slope to become unstable and trigger the movement. The dynamic responses of a highway slope under cyclic load are presented by a finite element numerical simulation method. The results show that the displacement，velocity and acceleration of the monitoring point on slope increase linearly with the increase of the maximum amplitude of cyclic load with a constant vibration frequency. However，the maximum response values of the slope under the cyclic load with a constant vibration amplitude are not proportional to the frequency，and there is a strong response in the frequency band of 4–5 Hz，approaching to predominant frequency of the slope. It is possible for the slope system under the frequency band of cyclic load to arise a disadvantageous resonance for the stability of the slope. It is of theoretical and practical significance to evaluate the long-term stability and durability of the highway slopes under dynamic load.
