To　investigate　the　effect　of　mechanical　damage　on　thermal　conduction,　a　mesoscopic　method　was　proposed　in　the　present　work　considering　the　heterogeneity　of　meso-structure.　In　this　study,　concrete　was　considered　as　a　three-phase　composite　material　consisting　of　aggregate,　mortar　matrix　and　interfacial　transition　zones　(ITZs)　between　them.　The　mechanical　analysis　was　conducted　first　to　study　the　damage　distribution　within　the　concrete.　Subsequently,　the　outcomes　of　mechanical　computation　were　used　as　the　initial　input　data　in　the　thermal　conduction　computation.　The　current　thermal　conductivity　of　damaged　element　was　homogenized　by　a　composite　mechanical　method　based　on　damage　and　the　initial　thermal　conductivity　of　sound　material.　It　is　in　this　way　that　the　mechanical　and　thermal　behavior　were　coupled.　The　present　model　was　calibrated　by　comparing　the　numerical　results　with　available　experimental　data.　Based　on　the　verified　simulation　method,　effective　thermal　conductivity　(ETC)　and　temperature　field　of　concrete　subjected　to　compressive　loadings　were　calculated.　In　addition,　the　effects　of　different　composite　mechanical　models　were　analyzed　and　the　influence　of　compressive　loading　levels　was　explored.　©　2018,　Engineering　Mechanics　Press.　All　right　reserved.