Objective:　In　order　to　improve　the　local　hemodynamics　of　coronary　artery　bypass　graft　and　reduce　the　incidence　of　restenosis,　a　double-bypass-graft　design　was　proposed　to　alleviate　artery　stenosis.　Methods:　Based　on　finite　element　method,　the　hemodynamics　of　the　conventional　bypass　graft　model　and　the　double-bypass-graft　model　was　adopted　for　numerical　simulation.　The　distributions　of　hemodynamics　such　as　flow　field　and　wall　shear　stress　in　the　vicinity　of　anastomosis　were　calculated.　Results:　This　new　design　provided　better　hemodynamics　near　the　main　anastomosis　region,　eliminated　the　vortex　and　flow　stagnation,　and　increased　the　wall　shear　stress　at　the　artery　floor.　The　axial　length　of　vortex　near　the　assistant　bypass　graft　by　this　new　design　was　only　3　mm,　which　was　shorter　than　that　of　4.5　mm　in　the　conventional　design.　Nearly　36%　of　the　total　blood　was　directed　into　the　assistant　bypass　graft.　Conclusions:　The　new　design　could　help　to　reduce　the　incidence　of　intimal　hyperplasia.