Abstract: In this paper, a new research area-the strengthening and tougheningmesoscopic mechanism of natural composites and biomimetic composites-is reviewed.Interest has been focused on the current status and the future prospect ofthe research on wood,bone,nacre, insect exskeleton and wing,Some biomimetic composite products have been designed and fabricated to the extent of commercial uses based ontheir biological prototypes,Mesoscopic biomimetics, whichis believed to have a potential impact on composites,is a novel...