For　the　personalized　reconstructed　model　of　restenosis　after　coronary　artery　bypass　graft,　the　influence　of　geometry　model　and　elastic　vessel　wall　on　hemodynamic　resulting　in　restenosis　is　studied　by　using　computational　fluid　dynamics.　Based　on　the　original　CT　data　of　coronary　artery　bypass　graft　from　patients,　the　surface　model　of　coronary　artery　bypass　graft　is　constructed　and　vessel　wall　is　generated,　and　the　surface　model　of　coronary　artery　bypass　graft　is　constructed　and　vessel　wall　is　generated　in　MIMICS.　The　coupled　model　of　vessel　wall　and　blood　established,　fluid-structure　interaction　based　on　the　two-way　is　carried　out　in　ANSYS　Mechanical　and　CFX　modules　by　using　the　finite　element　method.　The　wall　shear　stress　and　deformation　of　elastic　wall　and　rigid　wall　are　compared　with　in　a　given　pulse　pressure　condition.　Results　show　that　the　maximum　wall　shear　stress　and　displacement　of　the　personalized　model　are　higher　than　those　of　the　simplified　CAD　model,　and　locations　of　maximum　displacements　in　both　models　are　absolutely　different.　The　maximum　wall　shear　stress　and　displacement　are　lower　than　those　of　the　rigid　model.　Simulation　results　provide　more　realistic　reference　data　for　diagnosis　of　restenosis　after　coronary　artery　bypass　graft.