Numerical　methods　were　adopted　to　study　the　film　cooling　and　heat　transfer　performance　on　the　pressure-side　(P.　S.)　winglet-squealer　tip　of　a　turbine　stage　under　engine　condition.　The　heat　transfer　coefficient　and　film　cooling　effectiveness　on　the　winglet-squealer　tip　were　computed　at　five　different　streamwise　ejection　angles,　three　different　numbers　of　cooling　hole　with　P.　S.　defection,　and　four　different　P.　S.　defection　angles.　The　improvement　of　the　film　cooling　effect　and　mitigation　of　heat　transfer　on　the　winglet-squealer　tip　were　achieved　based　on　the　present　study.　The　results　show　that　the　inclined　coolant　ejection　is　effective　to　improve　the　film　cooling　effect　and　reduce　the　heat　transfer　on　the　P.　S.　winglet-squealer　tip　of　a　turbine　stage.　As　the　streamwise　ejection　angle　increases,　the　heat　transfer　coefficient　on　tip　decreased　at　first　and　then　increased.　If　the　streamwise　ejection　angle　equals　to　120　degree,　the　area-averaged　heat　transfer　coefficient　on　the　tip　surface　decreased　by　28.　26　%,　and　the　area-averaged　film　cooling　effectiveness　increased　by　33.　86%　as　compared　with　the　vertical　ejection　case.　Adjusting　the　ejection　angles　for　five　tip　cooling　holes　near　leading　edge　towards　the　P.　S.　is　beneficial　for　film　cooling　effect　improvement　on　the　cavity　floor　near　the　front　part.　Compared　to　the　case　that　all　tip　holes　deflection　towards　the　S.　S.,　the　area-averaged　heat　transfer　coefficient　on　the　tip　surface　decreased　by　15.65%,　and　the　area-averaged　film　cooling　effectiveness　increased　by　9.　51　%.　As　the　ejection　angles　for　five　middle-camber　holes　near　leading　edge　towards　the　P.　S.　equal　to　60　degree,　the　best　film　cooling　and　heat　transfer　performance　on　the　winglet-squealer　tip　are　achieved.　In　this　case,　the　area-averaged　heat　transfer　coefficient　on　tip　surface　decreased　by　38.　84　%,　and　the　area-averaged　film　cooling　effectiveness　increased　by　42.　24%,　as　compared　with　the　vertical　ejection　case.　Moreover,　the　uniformity　of　film　coolant　coverage　on　the　winglet-squealer　tip　is　improved　significantly.　©　2022　Xi＇an　Jiaotong　University.　All　rights　reserved.