The　geometical　structure,　combination,　magnetism,　electronic　structure　and　the　optical　absorption　properties　of　one　kind　of　oxygen　absorbed　2　dimentional　ZnO(110)　film　at　Zn　top　position　are　studied　by　density　funtional　theory　analyzing　method.　The　results　show　that　the　Zn-O　bond　length　is　increased　to　0.1992　nm　and　0.1973　nm,　the　distance　between　Zn-O　chains　is　decreased　to　0.5628　nm,　the　O-Zn-O　bond　angle　is　108.044°,　and　the　O　absorption　on　Zn　top　position　is　inclined.　The　ionic　combination　between　Zn　and　O　is　strengthened　by　O　absorption　on　Zn　top　position,　the　combination　between　absorbed　O　and　Zn　is　also　ionic.　The　total　energy　is　lowered　by　O　absorption,　the　oxygen　absorbed　ZnO(110)-O　is　antiferromagnetic　type　material.　The　oxygen　absorbed　ZnO(110)-O　is　indirect　band　gap　material　with　energy　gap　of　0.565　eV.　The　p　type　electrons　contribute　to　density　of　state　most　at　Fermi　energy.　The　oxygen　absorbed　ZnO(110)-O　has　an　absorption　peak　at　156　nm　with　absorption　unit　of　67181,　it　has　a　wide　absorption　band　above　445　nm.　©　2019,　Chinese　Ceramic　Society.　All　right　reserved.