Abstract: The aseismic behavior of damaged reinforced concrete (RC) shear wall repaired with the engineered cementitious composite (ECC) was studied by a pseudo-static test. The shear wall was tested by an initial pseudo-static test to severe damage in a shear mode with crushing of concrete, yielding and fracture of a steel bar, then repaired with ECC and retested. The response of the RC shear wall in the twice pseudo-static tests was compared to evaluate the followings, such as the efficiency of repairing a damaged RC shear wall with ECC in term of a failure mode, the bearing capacity, the displacement ductility, the energy dissipation, the stiffness degradation and the utilization of a steel bar. The test results indicate that: a. the bearing capacity of a shear wall is restored; b. on the premise of assuring bearing capacity, the ductility of a shear wall is improved, and the failure mode is changed from brittle failure into ductile failure; c. the energy dissipation capacity is also enhanced; d. rely on the good coordination between ECC and a steel bar, the crushing of concrete and buckling of a steel bar is avoided, and the utilization of a steel bar is improved.