Geometrically　virtual　models　of　three-dimensional　blood　flow　field　and　eight　types　of　mesh　stent　(different　porosity　and　different　stent　shape)　were　constructed　using　SoildWorks　software,　and　simulation　of　stented　models　were　performed　respectively　using　finite　element　software　ANSYS11.0　according　to　computation　fluid　dynamics　method.　The　flow　resistance　of　the　semi-circular　section　stent　model　of　blood　flow　from　the　semi-circular　planar　surface　was　greater　than　the　reverse　in　a　certain　range　of　permeability.　However,　the　result　was　the　opposite　when　the　porosity　increased　to　a　specific　value.　For　both　grid-stent　model　and　sine-stent　model,　flow　resistance　of　blood　that　flowed　from　the　stent　in　both　directions　increased　with　the　porosity　reduction.　Under　the　same　porosity　and　the　direction　of　blood　flow　from　the　same　stent,　the　flow　resistance　of　the　grid　stent　model　was　1.5　times　greater　than　the　sine-stent　model.　Results　showed　that　there　are　different　effects　on　the　flow　resistance　in　blood　flow　in　different　directions　from　the　semi-circular　section　stent　model.