Abstract: Toppling deformation is a typical form of damage observed in anti-dip layered rock slopes.To investigate the impact of different rock dip angles on the toppling deformation of anti-dip layered rock slopes, we utilized the toppling deformation body in front of the dam of Gushui Hydropower Station in the upper reaches of Lancang River as a prototype.Based on the large-scale geotechnical centrifuge test, the failure process, deformation evolution characteristics, and final failure mode of the anti-dip layered rock slope were analyzed and studied from the perspective of the change of rock stratum dip angle.The outcomes are conducted as follows:(1) The change of rock dip angle does not affect the stage evolution process of the slope, which can be summarized as rock compaction-crack development at slope toe, formation of bending plane in slope-partial instability, and penetration of bending plane-rock mass complete instability.(2) The larger the dip angle of the rock stratum, the faster the formation of the bending plane of the slope, the deeper the penetrated toppling failure of the slope after the instability failure occurs, the larger the corresponding deformation range, and the more severe the damage degree of the broken rock stratum.(3) The change of rock dip angle will lead to a certain difference in the toppling deformation process and the final instability mode of the slope.For model slopes with small dip angles of 55°and 70°,the front rock strata of the slopes undergo obvious bending and toppling deformation under gravity, and finally fail in an instability mode of “toppling-bending-slip”.The bending deformation of the slope with the largest dip angle of 85°is small, and finally, it is destroyed in a mode of “toppling-breaking-collapse”.The results can provide significant guidance for the implementation of large-scale engineering projects.