Abstract:High-strength and high-conductivity Cu alloys generally possess high strength after plastic deformation, however, with a loss of ductility. Therefore, it is desirable to develop new processes to continuously improve the mechanical and electrical properties. The Cu-0.7Cr-0.19Zr alloy was solution treated and cold rolled into thin sheets (sample SR). The samples were further prepared by three different processes: low temperature pre-aging (sample SRP), single-stage aging at high temperature (sample SRA), low temperature pre-aging combined with high temperature aging (sample SRPA). The microstructure, strength, ductility and electrical conductivity of the four samples were studied. The results showed that the aging treatment did not cause obvious recrystallization, but retained the ultrafine-grained structure and high-density dislocations. Compared with sample SR, both single-stage aging and two-stage aging can improve mechanical and electrical properties, and the two-stage aging route is more effective. Mechanisms for improving the strength, ductility and electrical conductivity were also analyzed.