In the single-stage quenching process, attaining good hardenability need to raise the cooling rate as fast as possible. But this will inevitably increase the interior residual stress, which could give rise to lower corrosion resistance and fracture toughness after aging. Consequently, the aim of this study is to achieve coupling control the cooling rate and the residual stress by using the multi-stage quenching process, and obtaining the applicable multi-stage quenching process for 7050 aluminum alloy plate.