This paper took Wuluwati concrete face sand-gravel dam for example, analyzed the dam displacement and stress distributions of completion period and water storage period in the case of considering sand-gravel rheological or not, and sumed up the influence of rheological effect on the stress and deformation of the dam. The results show that the vertical and horizontal displacement of the dam in considering the rheological effect is bigger than the one in not considering the rheological effect, the major and minor principal stress are also increased; from the calculation result of the settlement-time curve and additional node load it can be seen that the deformation of dam is mainly concentrated in the period of construction, the rheological deformation of the dam tends to be stable after a year of water storage, and the rheological calculation result is close to the actual observations result. Therefore, it''s necessary to consider the rheological effect when calculating the stress and deformation of concrete face sand-gravel dam.