Abstract: In this paper,a new model is completely derived on seepage through fissured rock mass under the coupled action of seepage and stress.To suit the needs of netted and stratified structures,principle and methods for producing fissured network are determined for the computation of seepage according to polygon fissured network theory.In the light of tectonic characteristics of rock fracture in the Laxiwa dam area,computation and analysis of seepage are fully conducted. Compared with porous media seepage model and fissured network seepage model,the present model shows its superiority.