The upgraded toughening technique of carbon fiber reinforced polymer was the important approach for preparing high performance composites. In the second-generation composite

thermoplastics have been used to toughen resin matrix by physical blending. In the third-generation composite

interlaminar reinforcing and toughening methods have been developed. Fundamental researches on nanofibers

resin films and particles interlaminar toughening carbon fiber composites have been carried out by Advanced Composites Center (ACC) in Beijing University of Chemical Technology (BUCT)

and the scientific problems of method constriction and toughening mechanism were broken through and the engineering application of particle interlaminar toughening was also achieved. Combining with domestic and foreign developments

the accomplishments of ACC teams in interlaminar reinforcing and toughening were reviewed

and the effects of three kinds of interlaminar toughening and corresponding multiscale interlaminar reinforcing and toughening techniques were contrasted. And the application prospect on interlaminar reinforcing and toughening technique was expected.