In order to further explore the deformation mechanism of high concrete face rock-fill dams with a broken line axis, a finite element numerical model was used to simulate the rockfill body stress and strain, the face slab stress and deformation as well as the structural joint deformation for a proposed reservoir dam with 3 dam axis layout plans. The nonlinear relationship between the above change rules and the dam axis angles was analyzed, and the deformation mechanism of the concrete face rockfill dam with large angle broken line axis was discussed. The results show that the tensile stress of the face slab around the turning point of the dam axis increases with the broken line angle. The topographic conditions and the symmetry of dam body at the turning point of dam axis have great influence on the stress and deformation of the dam body. Reasonable selection of the turning point and turning angle according to topographic and geological conditions is the key to design concrete face rockfill dams with broken line axis.