The stress field and seepage field of earth-rock dam have interaction and dynamic change.The rise of water level in the initial stage of water storage makes the stress and deformation of dam complex，and ignoring the influence of seepage easily leads to deviation of stress and deformation analysis.In this paper，based on biot consolidation theory，the fluid-solid coupling analysis of dam during construction and storage is carried out by using the method of variable permeability coefficient，and the influence of initial water content and initial stress field of dam material is considered，so as to simulate the influence of transient seepage field on stress and deformation of dam body.The results show that the dissipation of pore water pressure is often accompanied by soil deformation.During the completion period，the dam deformation is mainly settlement，and the large main stress has obvious arch effect.The water storage reduces the stress on the upstream side of the core wall and the dam body is staggered to the downstream side.Therefore，it is necessary to consider the influence of transient seepage field in the analysis of stress and deformation of dam body during initial impoundment.