Abstract: The effect of interrupted aging on the exfoliation corrosion susceptibility of solution heat-treated 7B04 aluminum alloy plates was investigated through hardness tests, electrical conductivity tests, exfoliation corrosion tests and transmission electron microscopy. The results show that compared with the two-step aged 7B04 aluminum alloy, the multi-stage interrupted aging treatment can maintain the alloy’s hardness and electrical conductivity while improving the capability of exfoliation corrosion resistance of the alloy. After the first-stage aging process, the grain boundary precipitates are fine and continuously distributed dot-like precipitates. After second-stage low-temperature aging process, the microstructure does not show prominent η phase precipitation characteristics. During the third aging process at 160 ℃, the rod-shaped η phase appears and coarsens at the grain boundary, showing a discontinuous distribution morphology. As a result,the electrical conductivity of 7B04 alloy has a moderate increase while the hardness rises to the peak after aging at 160 ℃ for 1-4 h and then gradually decreases. The optimal parameters in the study is two-step aged by 120 ℃×10 h+natural aging 10 d+160 ℃×18h. Under the condition, the hardness, electrical conductivity and exfoliation corrosion resistance level of 7B04aluminum alloy are 160.6 HV0.1, 21.7 MS/m and EB-, respectively.