Based　on　the　microfluidic　theory,　the　drying　process　of　film　printed　with　polyacrylate-QD　inks　was　studied.　Besides,　the　coffee　ring　effect　was　overcome　by　optimizing　solvent　ratio,　polymer　content　and　drying　temperature　to　improve　the　morphology　of　the　array　films.　The　results　showed　that　the　addition　of　high　boiling　point　solvent　is　helpful　to　delay　the　outward　flow　of　droplets　on　the　substrate.　Adjusting　polymer　content　can　change　the　physical　properties　of　the　inks,　which　is　beneficial　to　induce　inward　flow　and　hinder　outward　flow.　In　addition,　the　polymer　can　ameliorate　the　smoothness　of　the　films　because　of　the　leveling　effect.　Both　of　them　can　significantly　improve　the　morphology　of　coffee　ring.　Moreover,　adjusting　drying　temperature　can　optimize　the　pinning　of　contact　line　between　droplet　and　substrate,　thus　further　improving　the　morphology　of　coffee　ring.　Finally,　the　uniform　quantum　dot　films　and　quantum　dot　arrays　with　diameters　of　169　μm　and　heights　of　65　nm　were　prepared　at　the　quantum　dot　concentration　of　12　mg/mL,　the　volume　ratio　of　chlorobenzene/cyclohexyl　benzene　in　ink　is　8:　2,　the　mass　percentage　of　polyacrylate　is　11wt%,　and　the　drying　temperature　is　25,　which　provides　basic　technical　support　for　the　fabrication　of　QLED　devices　and　the　full-color　of　Micro-LED　panels.　©　2019,　Science　Press.　All　right　reserved.