Abstract: In order to explore the effect of molding parameters on the structure and properties of carbon fiber reinforced poly(ether ketone ketone) composites (CF/PEKK), CF/PEKK composite laminates were prepared by vacuum molding in this paper. The effects of molding temperature and pressure on the interface structure between resin and fiber, the condensed structure of PEKK and the mechanical properties of the composites were discussed systematically. The microstructure and the failure modes of the composites was analyzed by scanning electron microscope. The crystal structure of PEKK in the composites was observed by X-ray diffraction. The relationship between interfacial damping and molding process of the composites was studied by dynamic mechanical analysis. The results show that under the molding temperature of 365℃ and molding pressure of 5.0-6.0 MPa, the comprehensive mechanical properties of CF/PEKK composites are the best, in which the tensile strength is 965 MPa, the bending strength is 849 MPa, and the inter-laminar shear strength is 59 MPa. The fracture failure modes of the composites are mainly zigzag cracking and resin breakage.