To summarize, the seismic performance of the joints damaged by cyclic loads and then reinforced by BFRP can be improved significantly. The reinforcement method has great efficient on controlling the bending damage of column tip, shearing failure of the core area and anchor damage of joint. The BFRP sheets is equivalent to provide additional transverse reinforcement to increase shearing capacity of the core area, limit the concrete spalling and longitudinal reinforcement buckling, and prevent the joint to damage and slide so that the core area can come to the ideal ductile failure on the beam tip.