The　BJUT-II　ventricular　assist　device　(BJUT-II　VAD)　is　a　novel　intra-aorta　pump　and　brings　the　hemodynamic　effects　on　the　left　ventricle　that　is　still　unclear.　In　this　study,　the　situations　of　healthy,　heart　failure　and　assisted　by　BJUT-II　VAD　were　researched　with　the　method　of　computational　fluid　dynamics　(CFD)　to　evaluate　the　effect　on　left　ventricle.　The　3D　geometrical　model　was　rebuilt　at　the　end　systole　phase　of　3　situations.　The　boundary　conditions　of　the　left　atrial　pressure　(LAP),　aortic　pressure　(AP)　and　the　left　ventricle　volume　(Vlv)　derived　from　the　cardiovascular　lumped　parameter　model　that　were　proposed　in　previous　study.　Combining　these　pressures　and　the　displacement　that　calculated　from　the　volume　data　carried　out　the　numerical　simulation　by　CFD.　The　hemodynamic　indexes,　the　left　ventricular　pressure　(LVP)　and　the　wall　shear　stress　(WSS),　were　used　to　assess　the　hemodynamic　status.　The　results　shown　that　the　LVP　was　in　accord　with　the　physiology　in　healthy　situation.　The　pressures　of　heart　failure　and　assisted　situation　dropped　1788Pa　and　1455Pa　during　the　systole,　respectively.　The　peak　WSS　was　4.3Pa　and　3.8Pa　at　the　diastole　phase,　4.1Pa　and　1.3Pa　at　the　systole　phase　in　heart　failure　and　assisted　situation.　In　conclusion,　BJUT-II　VAD　can　help　to　decrease　the　LVP　and　the　ventricular　load.　Meanwhile,　it　also　can　decrease　the　WSS　to　improve　the　hemodynamic　of　left　ventricle.