Abstract: At the current stage and in the future, there will be a large number of precast structures in China. Seismic resilience of precast buildings has become a critical issue. Hence, this research focused on the seismic damage repair issue in the seismic resilience field and precast concrete (PC) shear walls were selected as the study object. With reference to the existing seismic damage repair method for cast-in-place components, two damaged PC shear walls were repaired, considering the effect of initial grouting defects on the seismic damage characteristics. The pseudo-static tests were subsequently conducted and the seismic performance of shear walls repaired were compared with that of cast-in-place shear wall. The test results indicated that the replacement concrete reinforcement method was also applicable to the damaged PC shear walls. Although the concrete crack development of specimens repaired was different from that of cast-in-place specimen prior to the yielding of reinforcement, the specimens repaired also exhibited an expected flexural failure mode. The load bearing deformation, and energy-dissipation capacities of specimens repaired were basically identical to those of cast-in-place specimen. Although the grouting defects significantly affected the damage mode of PC shear wall, the effect of grouting defects on the seismic performance of the specimens repaired were negligible. The seismic performance of specimens repaired, using the existing replacement concrete reinforcement method, are generally identical with that of the cast-in-place specimen. The outcome of this study can provide a reference for the investigation of loss functions of PC shear walls using grouted sleeve connection and resilience-based seismic design of PC structures.