As　an　improvement　of　the　conventional　1-way　bypass　graft　for　stenosed　arteries,　a　new　geometric　configuration　with　symmetric　2-way　bypass　grafts　is　presented.　The　physiological　blood　flow　in　the　improved　model　is　simulated　with　finite　element　method.　The　temporal　and　spatial　distributions　of　the　hemodynamics　during　a　cardiac　cycle,　such　as　flow　patterns,　wall　shear　stress　and　pressure　etc.,　in　the　vicinity　of　anastomosis　are　analyzed.　The　results　show　that　the　hemodynamics　in　the　2-way　bypass　grafts　are　better　than　those　in　the　1-way　bypass　graft.　The　2-way　bypass　grafts　can　considerably　improve　the　flow　conditions　and　decrease　the　probability　of　restenosis.