Abstract: In this work, we achieved an excellent combination of strength, stress relaxation resistance, and conductivity in the Cu-Be alloy via coupling control of precipitate distribution. Based on the revealed precipitation behaviors of Cu-be alloy aged at 360℃, not only the size, morphology and distribution of precipitated phases can be effectively controlled, but also the strength of the alloy can reach more than 1043MPa with a reasonable proportion of precipitates, and the corresponding conductivity and stress relaxation resistance can reach more than 30.8% and 96.7% respectively. Combined the influence mechanism of morphology, size, and distribution of precipitated phases on the stress relaxation resistance of the Cu-Be alloy, the kinetic equations for the stress relaxation behaviors of the alloy were established in this paper. Correspondingly, the prediction results of stress relaxation rate (SRR) of the alloy after different stress relaxation times can also be obtained. Our findings provide a useful route for high strength, high conductivity, and high stress relaxation resistance of Cu alloys.