Abstract: To study the influence of different degrees of steel corrosion and axial compression ratio on the seismic performance of corroded L-shaped reinforced concrete （RC） shear walls， the test specimens of 5 L-shaped RC shear walls with a shear-to-span ratio of 2.5 were subjected to accelerated corrosion by using dry-wet cycle and external current corrosion method， then the specimens were subjected to a pseudo-static test. The test results show that with the increase of corrosion degree， the bearing capacity of the specimens gradually decreased， and the decrease rate of positive （flange tension） bearing capacity was higher than that of the negative （flange compression）. The specimen deformation and energy dissipation capacity deteriorated to varying degrees， the stiffness degradation aggravated， and the percentage of shear deformation in the positive peak point increased. When the degree of corrosion was equal， with the increase of the axial compression ratio， the positive failure mode of the corroded specimen developed into small eccentric failure progressively. In the meantime， the positive bearing capacity of the specimens first increased and then decreased， while the negative bearing capacity of the test specimens gradually increased， and the increase rate of the negative bearing capacity was greater than that of the positive； the deformation capacity of the specimens constantly decreased， and the decrease rate of the positive deformation capacity was greater than that of the negative； the energy dissipation capacity， shear deformation and percentage of shear deformation of the specimens all decreased continuously.