Abstract:CuCrZr alloy is widely used in high-temperature field due to its excellent comprehensive properties. For high-temperature heat-resistant copper alloy，it is required to have better high-temperature structural stability and mechanical properties while maintaining high strength and high conductivity. In this paper，the heat resistance of CuCrZr alloy was improved by microalloying of Fe and Ti elements，and the effects of alloying elements on the microstructure and properties of CuCrZr alloy were studied. It was found that the addition of Fe and Ti made the deformation mechanism of the alloy change from slip dominated to coexistence of slip and twinning. Due to the influence of twinning mechanism，high-density nano- twins and stacking faults were formed in the alloy. These microstructural features were beneficial to the strength and ductility of the alloy. The study also found that the addition of alloying elements changed the composition of the second phase in CuCrZr alloy，making the second particles of nano-scale and micro-scale change from Cr to Cr/Fe. Because the addition of microalloying elements changed the microstructure and second particles of the alloy，the high-temperature stability of the alloy had been improved to a certain extent.