In order to elevate the localized corrosion resistance of 2A14 aluminum alloy，the effect of Cu content on the microstructure and corrosion-resistance properties of 2A14 aluminum alloy forgings was investigated by using scanning electron microscopy（SEM），pitting corrosion tests，cyclic anodic polarization curves （Tafel） and electrochemical impedance spectroscopy（EIS）. The results showed that the volume fraction of coarse Al2Cu and AlCuMgSi residual crystalline phase which induced pitting in 2A14 aluminum alloy matrix was reduced with the decrease of Cu content. The pitting density decreased significantly，the resistance to pitting properties and electrochemical corrosion properties was greatly improved due to the reduction of the constituents.