Flow　characteristics　and　heat　transfer　of　impingement/effusion　cooling　on　a　flat　plane　were　numerically　analyzed　by　ANSYS-CFX　software.　The　simulation　for　the　working　conditions　with　and　without　solid　domain　was　carried　out　to　find　their　influence　on　the　cooling　performance.　The　influence　of　solid　thermal　conductivity　and　effects　of　blowing　ratio　on　the　flow　structure,　vortex　intensity,　total　cooling　efficiency　and　flow　efficiency　were　discussed.　The　results　show　that　impingement/effusion　cooling　has　advantages　of　both　impingement　and　film　cooling　to　protect　the　solid　surface　well.　When　blowing　ratio　becomes　larger,　the　impingement　is　more　effective,　and　the　film　cooling　acts　adversely.　But　the　impingement　cooling　is　more　influential　so　the　total　cooling　efficiency　increases.　The　film　cooling　part　has　the　largest　local　pressure　loss　coefficient,　and　total　pressure　loss　coefficient　increases　with　the　increasing　blowing　ratio.　When　the　solid　thermal　conductivity　becomes　larger,　the　impingement　cooling　is　more　influential　and　the　total　cooling　effectiveness　increases.　©　2017,　Editorial　Office　of　Journal　of　Xi＇an　Jiaotong　University.　All　right　reserved.