For the study of methane hydrate formation in the process of the increase of the saturation of the influence of seepage characteristics,and relationship between saturation,porosity and absolute permeability of porous media.Combined with X-ray computed tomography(CT)image technology to obtain different saturation of pore network model under experimental conditions hydrate deposits,Avizo Fire and Comsol finite element software is used to simulate the absolute permeability of porous media under different saturation conditions,and the flow of fluid in the pores can be observed.The results show that with the increase of the saturation of gas hydrate,the permeability of the porous medium is decreased greatly when the saturation of gas hydrate between 39.07%and 56.89%.The relationship between hydrate saturation and permeability is obtained,which provides theoretical basis for the exploitation of gas hydrate.