Background:　Partial　support,　as　a　novel　support　mode,　has　been　widely　applied　in　clinical　practice　and　widely　studied.　However,　the　precise　mechanism　of　partial　support　of　LVAD　in　the　intra-ventricular　flow　pattern　is　unclear.　Material/Methods:　In　this　study,　a　patient-specific　left　ventricular　geometric　model　was　reconstructed　based　on　CT　data.　The　intra-ventricular　flow　pattern　under　3　simulated　conditions　-　＂heart　failure＂,　＂partial　support＂,　and　＂full　support＂　-　were　simulated　by　using　fluid-structure　interaction　(FSI).　The　blood　flow　pattern,　wall　shear　stress　(WSS),　time-average　wall　shear　stress　(TAWSS),　oscillatory　shear　index　(OSI),　and　relative　residence　time　(RRT)　were　calculated　to　evaluate　the　hemodynamic　effects.　Results:　The　results　demonstrate　that　the　intra-ventricular　flow　pattern　is　significantly　changed　by　the　support　level　of　BJUT-II　VAD.　The　intra-ventricular　vortex　was　enhanced　under　partial　support　and　was　eliminated　under　full　support,　and　the　high　OSI　and　RRT　regions　changed　from　the　septum　wall　to　the　cardiac　apex.　Conclusions:　In　brief,　the　support　level　of　the　BJUT-II　VAD　has　significant　effects　on　the　intra-ventricular　flow　pattern.　The　partial　support　mode　of　BJUT-II　VAD　can　enhance　the　intra-ventricular　vortex,　while　the　distribution　of　high　OSI　and　RRT　moved　from　the　septum　wall　to　the　cardiac　apex.　Hence,　the　partial　support　mode　of　BJUT-II　VAD　can　provide　more　benefit　for　intra-ventricular　flow　pattern.