The two-stage aging process can increase the corrosion resistance of the alloy while ensuring the high strength of the Al-Zn-Mg-Cu aluminum alloy material. The mechanical properties and microstructure change of 7A85 aluminum alloy panel under different two-stage aging conditions were studied by a tensile test at room temperature, conductivity measurement, and scanning electron microscopy (SEM). The results show that the influencing order of factors on the strength and conductivity of materials is as follows: final aging time > final aging temperature > initial aging temperature > initial aging time; the influencing order of factors on elongation is as follows：final aging temperature > initial aging temperature > final aging time > initial aging time. The orthogonal results show that the suitable two-stage aging system is 110 ℃ / 6h + 155 ℃ / 8h, the tensile strength is 617.0 MPa，and the elongation is 12.6%. This study provides a reference for the application of 7A85 aluminum alloy sheet in the aerospace field.