In order to study the effect of rheological and humidification effects of soft rock materials on the stress and deformation of face rockfill dam at different syages. The rheological and humidification models of soft rock materials were searched and compared, and the existing finite element method for the rheological and humidification effects of soft rock materials was analyzed and studied. Taking a face rockfill dam as an example, four calculation conditions were established according to different periods of the dam and whether rheological and humidification effects are taken into account, and then the three-dimensional finite element stress deformation of the dam was calculated respectively. Based on the calculation results of four working conditions, the influence laws of rheological and humidification effects of soft rock on the stress deformation of soft rock materials during the completion period and the water storage period of the rockfill dam filled with soft rock were summarized. The results showed that the maximum vertical displacement, horizontal displacement and main stress of the cross section of the dam increase significantly during the completion period and the water storage period, but increase more in the water storage period. It can be seen that the rheological and humidification effects of soft rock material have a great influence on the stress and deformation of soft rock material filling panel dam, and the influence is more obvious in the water storage period.