Abstract: In order to study the influences of the oblique incidence seismic waves on the seismic response of the high concrete face rockfill dam, a total wave field of the artificial boundary is separated into free field without local topography effects and scattering field caused by local topography effects according to the thought of wave field decomposition. The seismic input method considering the non-uniform ground motion under the free field is established based on the viscoelastic artificial boundary. Furthermore, the influences of radiation damping of the infinite foundation and traveling wave effects are also realized by the method. The dynamic response analysis of a high concrete face rockfill dam under the actions of different incident waves and the incident angle is made, and studies of a dynamic response rule of the dam under the action of plane P wave and SV wave are carried out. It is found from the results of the dynamic response that the oblique incidence seismic wave is significantly different from the vertical incidence. With the increase of the incident angle of incident P wave, the peak acceleration and the peak displacement in the horizontal component is gradually increased, while the peak acceleration and the peak displacement in the vertical component is gradually decreased, which is opposite to the case of incident SV wave. The safety of the high concrete face rockfill dam cannot be ensured if only considering the influences of the vertical incidence. At the same time, the traveling wave effects and the amplitude of the acceleration response spectrum on crest of the dam are also influenced by the incident angle.