Abstract: The T6 state 7075 aluminum alloy was treated by double stage aging and regression aging (RRA) treatment.The microstructure was analyzed by SEM and XRD. The mechanical properties were tested by hardness test and tensile experiment. The electrochemical methods were used to study the corrosion behavior by test the polarization curve and AC impedance. The experimental results show that, compared with the aluminum alloy in the T6 state, the hardness and the strength of the aluminum alloy after double stage aging decreases, but its elongation rate increase. After the regression and re-aging treatment, the hardness of the alloy increases to 179.8 HV, the yield strength increases to 509.5 MPa and the tensile strength is 561 MPa and the elongation remaines constant. The self-corrosion potential of the alloy after RRA treatment is close to the self-corrosion potential of the double stage aging state, which is higher than the T6 state alloy.The self-corrosion current density of the RRA state alloy is 3.3151 μA/cm², only about 1/2 of the T6 alloy, and its equivalent resistance is much higher than that of the T6 alloy. The above results indicate that RRA treatment improves the toughness and corrosion resistance of the alloy, while maintaining the higher strength and hardness.