In　this　study,　Cu-10W　and　2　wt%Y2O3/Cu-10W　composites　were　successfully　prepared　via　mechanical　ball　milling　and　spark　plasma　sintering.　Hot　compression　experiments　on　the　two　materials　were　carried　out　in　the　temperature　range　of　300　degrees　C-600　degrees　C　and　in　the　strain　rate　range　of　0.01　s(-1)-10　s(-1).　The　hot　deformation　activation　energy　of　the　two　materials　was　calculated　and　a　constitutive　equation　was　established.　The　optimum　hot　deformation　process　parameters　were　obtained　according　to　a　hot　processing　map.　The　effects　of　Y2O3　on　the　thermal　deformation　behavior　of　the　Cu-10W　composites　and　their　microstructures　were　investigated,　and　the　results　showed　that　Y2O3　could　enhance　the　stability　of　Cu-10W　at　high　temperatures.　The　activation　energies　of　thermal　deformation　of　Cu-10W　and　2　wt%Y2O3/Cu-10W　were　159.56　kJ/mol　and　129.85　kJ/mol,　respectively.　Moreover,　Y2O3　improved　the　interfacial　bonding　strength　of　Cu　and　W　in　the　Cu-10W　material,　effectively　preventing　the　generation　of　microcracks　and　pores　during　the　high-temperature　compression　process;　Y2O3　provides　more　nucleation　sites　in　the　recrystallization　process,　which　is　favorable　for　the　excitation　of　recrystallization.　A　low　strain　rate　at　high　temperatures　favors　the　occurrence　of　recrystallization,　and　the　2　wt%Y2O3/Cu-10W　composites　tend　to　exhibit　discontinuous　dynamic　recrystallization　(DDRX)　under　high-Z-value　conditions　and　continuous　dynamic　recrystallization　(CDRX)　under　low-Z-value　conditions.