Abstract: Under the premise of continuous improvement of lightweight and structural performance of carbon fiber reinforced polymer matrix composites, enhancing specific functions, especially in the case of no loss, or even enhancement of their interlaminar fracture toughness, can not only compensate for the inherent shortcomings of structural composite materials, such as the electrical insulation of the resin matrix, but also enable them to meet the requirements of specific products, such as high stiffness and certain sound absorption and noise reduction properties. Obviously, for cutting-edge applications such as aerospace, such function-added or structure-function-integrated composites technology is crucial to the future development of aerospace technology. In this paper, the design, preparation, and performance studies of four typical function-integrated structural composites are presented, which are conductivity-toughening integrated laminate based on functionalized interlayer technology (FIT), and based on inter-woven conductive weft fabric (IWCWF); Sound absorption composite based on honeycomb/micro-perforated panels sandwich structure filled with carbonized cotton fibers with hierarchical pores, and based on folded structures prepared from woven fabric/nonwoven mats. The first two materials achieved simultaneous improvement in the electrical conductivity and interlaminar toughness of composite materials by inserting conductive functional interlayers into the resin-rich layers and introducing a conductive weft network throughout the composite. The latter two materials demonstrated excellent sound absorption performance through the technology using honeycomb/micro-perforated panel sandwich filled with carbonized cotton fibers with hierarchical pores, and the folding technology of woven fabric/nonwoven fiber mats composite sheets. This showcases the application of multi-scale, multi-level structural design and fabrication techniques in the functional integration and structural-functional integration of structural composites.