Al2O3-Cu/25W5Cr　and　Al2O3-Cu/35W5Cr　composites　were　fabricated　by　vacuum　hot-pressing　sintering　and　internal　oxidation　process.　The　electrical　conductivity,　relative　density　and　Brinell　hardness　were　measured.　The　effects　of　the　nano-Al2O3　and　tungsten　on　the　Al2O3-Cu/(W,　Cr)　composites　hot　deformation　were　investigated　through　the　isothermal　compression　tests　using　the　Gleeble-1500D　thermo-mechanical　simulator　ranging　from　650　degrees　C　to　950　degrees　C　and　0.001-10　s(-1)　strain　rate.　The　deformed　microstructure　was　characterized　and　analyzed　by　optical　and　transmission　electron　microscopy.　The　interaction　of　work　hardening,　dynamic　recovery　and　dynamic　recrystallization　was　illustrated.　It　is　demonstrated　that　Cr　particles　were　extruded　into　strips;　W　particles　underwent　a　slight　deformation　during　the　hot　compression.　Besides,　the　higher　tungsten　content　composite　had　higher　flow　stress.　Nano-Al2O3　particles　pinned　dislocations　and　inhibited　the　dynamic　recovery　and　dynamic　recrystallization.　In　addition,　it　is　still　in　the　stage　of　sub-crystals　formation　at　850　degrees　C,　0.01　s(-1).　Consequently,　the　Al2O3-Cu/35W5Cr　composite　has　typical　dynamic　recovery　characteristic.　Hence,　Al2O3-Cu/(W,　Cr)　composites　demonstrate　outstanding　high　temperature　performance.