Abstract: To study the seismic performance of damaged masonry structures reinforced with High Ductility Concrete (HDC), a two-storey masonry store model with a scale ratio of 1/2 was tested on shaking table for three cases:unreinforced, reinforced using steel-meshed cement mortar and reinforced using HDC. The dynamic characteristics, acceleration response, displacement response, structural torsion and failure pattern of HDC reinforced masonry structure were analyzed through comparisons of the three cases. The experimental results show that the HDC surface-layer reinforcement can significantly improve the damage tolerance, deformation ability and overall stiffness of masonry structure, delay the declination of structural stiffness and effectively transfer the horizontal shear force. The HDC surface-layer reinforcement can effectively resist structural torsion caused by the dislocation of mass center and stiffness center. Reinforced with HDC surface layer, the seismic performance was obviously better than that reinforced using steel-meshed cement mortar. The HDC surface layer can greatly reduce the damage degree of masonry structures subjected to the earthquake with intensity of 8.