Abstract: In order to study the change of seismic performance of corroded L-shaped RC shear wall, the accelerated corrosion test was carried out on 5 specimens with constant current and wet and dry cycle, and the pseudo-static test was carried out after reaching the preset corrosion rate. The influence of the degree of corrosion and the change of reinforcement ratio on the bearing capacity and deformation capacity of the corroded L-shaped RC shear wall is studied. The study results show that: the steel bar morphology similar to that of natural corrosion can be obtained by using constant current-dry and wet cycle accelerated corrosion technology, with the deepening of corrosion degree, with the cracking, with the yield and peak load of the specimen decrease, and with the bearing capacity and deformation ability weaken continuously. With the increase of the longitudinal reinforcement ratio of the dark column, the crack distribution height of the specimen web is increased, and the bearing capacity is enhanced, but the shear failure characteristics are more obvious, resulting in continuous reduction of deformation capacity and more sudden failure. Based on the experimental results, a nonlinear numerical analysis model of L-shaped RC shear wall considering bending, shearing, bond slip and corrosion is established upon fiber elements in OpenSees platform. By comparing the numerical simulation results with the test ones, it is found that the parameters of each characteristic point of the simulated skeleton curve and the test skeleton curve are relatively small, which indicates that the model can accurately simulate the nonlinear behavior of the corroded L-shaped RC shear wall under complex loads.