In this paper, the Cu-8wt%Ag alloy was prepared by two kinds of preparation technologies, namely the continuous casting cold wire-drawing deformation preparation technology (CC CD) and the continuous casting equal channel angular pressing cold wire-drawing deformation preparation technology (CC ECAP CD), and subsequently was performed the aging treatment. This paper measured respectively the mechanical property and the electrical property of the Cu-8wt%Ag alloy with the different strain, explored the changing rules of the microstructure, the mechanical property and the electrical property by the different preparation technologies, analyzed the changing reasons of performance and discussed whether the better comprehensive performance was acquired by combining the ECAP with the traditional cold-processing. The results show that the comprehensive performance of the Cu-8wt%Ag alloy prepared by CC ECAP CD is a little better than that by CC CD. It is significant and valuable to solve the waxing and waning problem between the high strength and high conductivity of the Cu-Ag alloy.