Quantum　dot　light　emitting　diodes　(QLEDs)　are　increasingly　attractive　owing　to　their　compatibility　with　the　inkjet　printing　process　and　potential　application　in　low-cost　large-area　full-color　pixelated　display.　The　strategy　for　controlling　the　morphology　of　the　quantum　dot　layer　is　definitely　critical　for　realizing　all-solution　processed　QLEDs　with　high　performance,　which　certainly　requires　in-depth　thinking　regarding　the　design　of　ink　composition　and　their　optimization　in　the　printing　process.　Herein,　by　carefully　controlling　the　quantum　dot　ink　composition　and　physicochemical　properties,　we　demonstrate　that　the　viscosity,　contact　angle,　and　the　three-phase　contact　line　moving　would　affect　the　final　morphology　of　the　quantum　dot　film　formed　by　inkjet　printing.　We　achieved　coffee　ring-free　and　low-roughness　quantum　dot　film,　and　all-solution　processed　QLEDs　with　normal　structure　were　fabricated　for　the　first　time.　The　devices　have　a　low　turn-on　voltage　of　2.0　V,　a　luminance　of　12100　cd/m2at　the　voltage　of　12　V,　and　a　maximum　current　efficiency　of　4.44　cd/A　at　the　luminance　of　1974　cd/m2,　which　is　the　best　result　to　date　for　inkjet-printed　red　QLEDs.　The　results　will　pave　the　way　for　future　application　of　inkjet　printing　in　solution　processed　pixelated　QLED　display.　©　2017　American　Chemical　Society.