Abstract:The Dynamic finite element model of rock slope with prestressed anchor is established by using software of geotechnical engineering Geostudio, in order to simulate the displacement, velocity, stress and axial force change law of rock slope under the action of EI-central wave with peak acceleration of 0.3 g. The results show that the seismic dynamic action has cumulative increase effect on the horizontal displacement of slope, and the horizontal displacement of rock slope has typical "whip tip effect ", The horizontal displacement of the upper part is larger than that of the lower part, the horizontal displacement of the surface layer is larger than that of the inner part, and the vertical displacement is negligible compared with the horizontal displacement; the horizontal velocity of the rock slope is obviously larger than the vertical velocity, which indicates that the surface part is more vulnerable to instability under seismic action; The axial force of prestressed anchor rod fluctuates with the prestress value of seismic wave under the action of seismic force and with the rock quality With the increase of slope elevation, the greater the peak anchoring force. The research results provide a reference for the understanding of the joint force law of rock slope and prestressed anchor rod under seismic dynamic action.