To research the damage of Reinforced Concrete Core Walls under earthquake, Based on damage models of Reinforced Concrete Shear Wall Members and Coupling Beam Members under low cycle reversed loading,using the weighted partial coefficient method to study the multi-scale effect of migration and transformation from member damage to structure damage, the global damage model which could reflect migration and evolution law from member damage to local damage and global damage was established. the validity of the damage model was verified through a comparison with the test results, the damage states and corresponding damage index range of Reinforced Concrete Core Walls were defined by combining the damage indexes. The result shows that the damage model can well describe the seismic damage evolvement process and the damage degree of reinforced concrete core walls, The study results will supply the theory support for the seismic damage assessment and the establishment of damage-based earthquake-resistant design method of Reinforced Concrete Core Walls.