Coronary　rotational　atherectomy　is　an　effective　technique　for　treating　cardiovascular　disease　by　removing　calcified　tissue　using　small　rotary　grinding　tools.　However,　it　is　difficult　to　analyze　the　stress　force　on　vessel　walls　using　experiments　directly.　Using　computational　fluid　dynamics　is　a　better　way　to　study　the　stress　force　characteristics　of　the　burr　grinding　procedure　from　a　fluid　dynamics　perspective.　For　this　purpose,　physical　and　simulation　models　of　atherosclerotic　plaque　removal　were　constructed　in　this　study.　The　simulation　results　show　that　smaller　ratios　between　the　burr　and　arterial　diameter　(B/A　=　0.5)　result　in　a　more　stable　flow　field　domain.　Additionally,　the　pressure　and　stress　force　generated　by　the　4.5　mm　diameter　grinding　tool　reach　92.77　kPa　and　10.36　kPa,　surpassing　those　of　the　2.5　mm　and　3.5　mm　grinding　tools.　The　study　has　demonstrated　the　use　of　computational　fluid　dynamics　to　investigate　wall　shear　stress　characteristics　in　medical　procedures,　providing　valuable　guidance　for　optimizing　the　procedure　and　minimizing　complications.　©　2023　by　the　authors.