Abstract: Structural materials applied in lead-cooled fast reactors will inevitably undergo plastic deformation, so it is important to recognize and understand the influence of plastic deformation on the corrosion behavior of structural materials. In this work, the corrosion behavior of SIMP steels with different rolling deformations in liquid LBE at 550 °C was investigated. It was found that the rolled samples exhibited higher oxidation rates than the original samples during the pre-corrosion period, due to the fact that the grain boundaries and dislocations created by rolling promote the diffusion of atoms, which in turn accelerates the growth of the oxide layer. In the late stage of corrosion, the diffusion of Fe and O elements is inhibited due to the formation of Cr and Si-rich oxides. As a result, the rolled samples exhibit low oxidation rates relative to the original samples.