A new kind of reinforced core-material fi lled in the Bermuda Triangle of integral structure named ZXC190、ZXC195,as well as the manufacturing technology and testing method of mechanical properties of joints fi lled with this reinforced core-material are introduced. The initial damage load and failure load of joints are presented. The test results show that compared to the joints fi lled prepreg, the tensile performance of these joints with the reinforced core-material ZXC190、ZXC195 along the web direction had been signifi cantly increased.