Landslide with plane rotation under lockup of centric segment is formed in the course of progressive failure of layered rocks on the oblique bank slope.

The large-scale deformation slope on the right shoulder of the Heihe reservoir dam is a very special slope mass which acts as plane rotation In the paper, why the deformation slope took place and how it developed are introduced in detail A planerotation model is used to evaluate the stability of the deformation slope, the result is satisfactory and corresponding curing measures are propose

The landslide with locked flank in plane rotation is progressively formed while the slope rock mass shows an asymmetrical rotation revolving round on the axis perpendicular to the latent sliding plane.

The numerical results show that the Kagome cells with the rotation deformation behavior have better energy absorption performance than triangle and hexagonal cells.