Hemodynamics　plays　a　crucial　role　in　the　development　and　progression　of　coronary　atherosclerosis,　which　is　prone　to　occur　in　branch　bifurcation.　An　individual　aortic-coronary　artery　model　and　three　changed　bifurcation　angle　models　are　constructed　by　Mimics　and　Freeform　based　on　computed　tomography　angiography.　The　influence　of　different　coronary　bifurcation　angles　between　left　main　(LM),　left　anterior　descending　(LAD),　and　left　circumflex　(LCX)　on　the　blood　flow　field　and　related　hemodynamic　parameters　are　studied.　It　is　shown　that　a　wider　bifurcation　angle　between　LAD　and　LCX　can　cause　a　wider　low-wall　shear　stress　area,　leading　to　atherosclerosis.　Similarly,　a　decreased　angle　between　LM　and　LAD　is　predisposed　to　prevent　atherosclerosis.　The　results　help　to　better　understand　the　hemodynamic　causes　of　atherosclerosis　with　various　bifurcation　angles　in　coronary　arteries　and　to　provide　guidance　for　clinical　assessment　and　prevention.