Abstract: Based on the dynamic triaxial testing results of the rockfill materials, studies of the variation law of residual deformation of the rockfill materials before and after reinforcement are carried out in the paper. The analysis results show that with the increase of vibration times, the role of reinforcement is beginning to manifest, and the differences between the residual deformation of the rockfill materials before and after reinforcement are increasing. The residual deformation of the rockfill materials increases with the increase of the confining pressure and the dynamic stress ratio. The reinforcing effects of the three-layer reinforcement are better than those of the one-layer reinforcement, but with the increase of the reinforcement layer, the decrease range of the residual deformation of the rockfill materials will gradually decrease. The size of the reinforcement mesh has little influence on the residual deformation of the reinforced rockfill materials. In addition, an exponential empirical formula developed in this study can well simulate the relationships between the residual shear strains and vibration frequency of the reinforced rockfill materials.