Loop　heat　pipe　(LHP)　is　an　efficient　and　passive　heat　transfer　device.　However,　heat　leakage　may　lead　to　several　problems　such　as　temperature　oscillation　and　even　startup　failure,　which　hinders　the　practical　application.　To　weaken　the　negative　effects　of　heat　leakage　and　improve　the　performance　of　LHP,　a　novel　loop　heat　pipe　with　a　vapor-driven　jet　injector　(LHPI)　is　proposed.　The　injector,　which　is　driven　by　the　vapor　from　the　evaporator,　can　suck　the　hot　liquid　and　form　a　directional　motion　of　liquid　in　the　compensation　chamber　to　remove　the　heat　leakage.　The　results　indicate　that　the　LHPI　can　operate　with　heat　load　range　of　50550　W　and　heat　leakage　higher　than　20%　using　deionized　water　as　working　fluid.　The　maximum　heat　flux　of　LHPI　is　48.6　W/cm2,　corresponding　to　a　total　thermal　resistance　of　0.27　°C/W.　While　maintaining　the　heating　wall　temperature　within　85　°C,　the　maximum　heat　flux　reaches　22.1　W/cm2,　corresponding　to　a　thermal　resistance　of　0.33　°C/W.　The　heat　transfer　performance　of　LHPI　is　greatly　improved　compared　with　most　of　the　conventional　LHPs.　©　2020