In　this　paper,　the　aqueous　solution-processed　molybdenum　oxide　(sMoOx)　as　an　efficient　hole　injection　layer　for　flexible　quantum　dot　light　emitting　diodes　(QLEDs)　was　prepared　using　a　simple,　low-cost　and　non-toxic　solution　method.　Compared　to　the　traditional　device　used　poly(3,4-ethylenedioxythiophene)　polystyrene　sulfonate　(PEDOT:PSS)　as　hole　injection　layer,　the　flexible　QLED　with　modified　sMoOx　film　has　a　higher　maximum　current　efficiency,　5.46　cd/A.　In　addition,　the　stability　and　lifetime　of　flexible　devices　are　improved　effectively　with　the　use　of　inorganic　molybdenum　oxide　as　hole　injection　layer,　and　they　presented　excellent　flexibility　through　the　repeated　mechanical　bending　test　at　5　mm　radius　of　curvature.　©　2018　Elsevier　B.V.