The influence of stress path on the stress-strain relationship of sand is illustrated by test information. Stress path characteristics of earth-rock dams are analyzed according to the test information and the results of finite element method. Some calculation methods of earth-rock dam deformation taking stress path into account are introduced afterwards. Finally
well relationship between the stress-strain curves under constant stress ratio and that of variable stress ratio is revealed by analying their test information. The computational method of nonlinear elastic model parameters under variable stress ratio is derived. The deformation analysis method of earth-rock dams considering the influence of stress path is presented.