Thermal　performance　of　different　multi-level　walls　were　investigated,　the　unsteady　heat　conduction　reaction　coefficient　of　multi-level　wall　was　derived　and　corresponding　computer　program　was　presented,　the　heat　transfer　coefficients　of　the　different　kinds　of　multi-level　wall　were　calculated　by　program.　The　results　show　that　when　pasting　20mm　thickness　mixed　mortar　or　insulation　mortar　on　outer　and　inner　surface　of　multi-level　wall,　the　heat　transfer　coefficient　of　190mm　thickness　recycled　concrete　self　insulation　block　wall　is　1.940W/(m2·K)　or　0.961W/(m2·K),　2.95%,　36.02%　and　1.44%,　17.79%　lower　than　that　of　240mm　thick　clay　brick　wall　and　190mm　thick　normal　concrete　block　wall,　respectively.　The　heat　transfer　coefficient　of　recycled　concrete　self　insulation　block　wall　is　closely　related　to　the　properties　of　raw　materials,　i.e.　recycled　fine　aggregate　replacement　ratio　and　glazed　hollow　bead　volume　fraction.　The　heat　transfer　coefficient　of　different　mix　proportion　of　recycled　concrete　self　insulation　block　walls　are　little　different　when　glazed　hollow　bead　volume　fraction　is　higher　than　60%.　The　difference　of　theoretically　calculated　and　experimentally　measured　heat　transfer　coefficient　is　within　5%.　The　wall　of　developed　recycled　concrete　self　insulation　block　has　a　good　energy　saving　effect.　©　2016,　Editorial　Department　of　Journal　of　Building　Materials.　All　right　reserved.