Although measures were taken to pre-damaged component, Paste can not reach the depths of the small cracks in components. Epoxy injection and reinforcement with BFRP can only improve the seismic performance to some extent (Fig5). When the displacement is more than 84mm, the stiffness of J0 decreased rapidly, but the others slowly. BFRP makes an important role in limiting the cracks and delaying the structural stiffness attenuation. The joint may maintain the proper capacity in a larger deformation to improve the ductility. Therefore the reinforced method is effective to improve the seismic performance of 3D column-beam joint.