Abstract: A dynamic calculation model of soil nailing structure forslope protection is proposed in the present paper. The interaction betweensoil and soil nailing is treated as linear spring and damping system relatedto velocity. The inertia of the facing upon soil nailing is simplified as anequivalent concentrated mass. Excitation equations of vibration responseunder horizontal harmonic earthquake are established, and the analyticalsolutions are obtained for steady vibration. 3D nonlinear FEM with ADINAsoftware is carried out to verify the proposed model. The results show thatthe present model is safe and credible for the design of uniform soil slope.The calculation model provides a new approach for earthquake analysis andantiseismic design of the structure protected by soil nailing.