Colloidal　quantum　dot　materials　have　been　widely　studied　for　their　excellent　narrow　emission　spectra，tunable　emission　wavelengths，high　luminous　efficiencies　and　excellent　stability，and　their　simultaneous　solution-pro-cessability　has　made　quantum　dot　light-emitting　diodes（QLEDs）widely　applicable　and　used.　However，the　inherent　substrate　mode　within　the　device　leads　to　a　large　amount　of　photons　in　QLED　devices　being　confined　internally　and　not　utilized.　In　this　work，a　solvent　self-infiltration　nanoimprinting　process　is　developed　based　on　the　traditional　nanoimprinting　process　while　utilizing　the　surface　binding　energy　of　polydimethylsiloxane　（PDMS）　material　itself，which　has　low　pressure　dependence　and　simplifies　the　traditional　process　flow，and　based　on　which　the　micro-nanostructured　patterns　in　three　sizes　of　1.　3，1，0.　5　μm　with　high　periodicity　are　produced.　Micro-nano-structured　patterned　layers　of　three　sizes　were　fabricated　based　on　which　the　red，green　and　blue　QLED　devices　were　out-coupled　to　realize　light　extraction.　In　this　case，the　brightness　of　the　1.　3　μm　micro-nanostructured　coupled　green　QLED　device　reaches　715　069　cd·m-2，and　the　maximum　external　quantum　efficiency（EQE）and　current　efficiency　are　enhanced　to　12.　5%　and　57.　3　cd·A-1.　The　individual　electrical　performances　of　the　1　μm-size-coupled　blue　QLED　device　are　nearly　200%　improvement.　The　EQE　of　the　0.　5　μm　size-coupled　red　QLED　device　is　also　improved　from　17.　3%　to　20.　5%.　And　through　the　angular　distribution　test，it　is　proved　that　the　micro-nano　structure　does　not　affect　the　luminous　intensity　of　QLED　devices，which　is　still　close　to　the　Lambertian　emission.　The　solvent　self-infiltration　nanoimprinting　process　and　QLED　light　extraction　method　proposed　in　this　work　provide　a　simple　and　effective　way　to　improve　the　performance　of　QLEDs.　©　2024　Editorial　Office　of　Chinese　Optics.　All　rights　reserved.