The seismic response of rock slope is one of the most significant issues in the field of geotechnical engineering. In this study

the intake slope of Zipingpu project is investigated to study the influence of Wenchuan earthquake based on the monitoring data. From the perspectives of time and space

the characteristics of supporting load and slope displacement have been analyzed before and after Wenchuan earthquake. Furthermore

the synergistic effect of slope shape

rock mass structure and supporting load under seismic force is discussed. The results show that the sudden increases both in deformation and supporting load of slope are principally caused by the seismic force

and thus earthquake is regarded as the main influencing factor. It is found that the change of supporting load caused by the earthquake is below 100 kN

which is less than 5% of the design load. Permanent displacement of the slope in horizontal direction is within the range of 12 mm and the deformation distribution in depth is controlled by the structural plane of rock mass. Particularly

the maximum displacement concentrates in the middle part of the slope. Free surface amplification effect has been found along the horizontal direction

while there is no obvious vertical amplification effect along the elevation direction. Therefore

this research can not only underpin the understanding of the dynamic response mechanism of anchored rock mass

but also provide references for the aseismic design of slope engineering controlled by the displacement .