Thin-film　encapsulation　plays　an　essential　role　in　the　stability　of　flexible　displays.　Although　Al2O3　film　has　good　water-oxygen　barrier　properties,　its　bending　performance　needs　to　be　enhanced.　This　paper　inserts　Alucone　into　Al2O3film　to　generate　Al2O3/Alucone　overlapping　film　with　good　barrier　and　bending　performance　to　improve　the　encapsulated　devices.　The　finite　element　analyzing　approach　and　the　calcium　dot　arrays　test　are　employed　to　investigate　the　influence　of　structural　ratio　and　overlapping　density　onthe　water-oxygen　barrier　and　mechanical　properties　of　theAl2O3/Alucone　overlapping　film.　The　results　show　that　the　proportion　of　Alucone　sub　layers　in　the　Al2O3/Alucone　overlapping　film　(with　a　total　thickness　of　60　nm)　is　directly　proportional　to　the　overlapping　structure＇s　ability　to　disperse　stresses　and　inversely　proportional　to　the　overlapping　structure＇s　water-oxygen　barrier　property.　When　theAl2O3/Alucone　overlapping　structure　ratio　is　1:1,　theAl2O3/Alucone　overlapping　film　can　balance　the　bendingand　barrier　properties.　The　bending　property　ofAl2O3/Alucone　overlapping　film　(Al2O3/Alucone　ratio　is　1:1,total　thickness　is　60　nm)　diminishes　with　increasing　overlapping　density,　and　its　water-oxygen　barrier　property　increases　and　then　drops.　Combining　the　results　of　the　simulation　and　calcium　dot　arrays　test,　it　is　apparent　that　when　the　Al2O3/Alucone　ratio　is　1:1　and　the　overlapping　density　is　5,　the　Al2O3/Alucone　overlapping　film　has　good　bending　and　barrier　performance.　This　is　expected　to　promote　the　development　of　commercial　flexible　display　technology.　©　2024　John　Wiley　and　Sons　Inc.　All　rights　reserved.