Abstract: Before and after 6 GPa pressure treatment,the phase transformation temperature,time and activation energy of α+γ2→β in Cu-Al alloy during heating were measured and caculated.The effect of high pressure treatment on the transformation of α+γ2→β in the alloy was discussed.The results show that high pressure treatment could decrease the transformation temperature and transformation activation energy,shorten the transformation time,and be beneficial to the transformation of α+γ2→β in the Cu-Al alloy,but had little effect on the transformation mechanism.