The cable-sliding friction aseismic bearing (CSFAB)which is consist of the pot bearing and elastic cables,could dissipate energy by pot bearing and restrain girder displacement by using elastic cables.In an attempt to evaluate the effectiveness of CSFAB for cable-stayed bridges,a 3D nonlinear model is developed.The maximum bear displacement at the side pier and the curvature ductility of tower are selected as the two main engineering demand parameters (EDP).Fragility curves are obtained for As-built bridge and that retrofitted with CSFAB using probabilistic seismic demand model (PSDM).Combining the fragility curves with seismic hazard curve,the 50 years demand hazard curves of the structure with and without CSFAB were obtained.The results show that the CSFAB could reduce the pier-girder relative displacement effectively and mitigate the bending moment at the tower base as well.The annual damage probability is decreased significantly when the CSFAB is installed in the cable-stayed bridge.