Anionic polyamide 6 resin and continuous carbon fiber (CF) reinforced anionic polyamide 6 (APA6) thermoplastic composites were prepared by resin transfer molding process (RTM), and the effects of catalyst ratio on the conversion, crystallinity and mechanical properties of APA6 resins were studied. The influence of fiber volume fraction on the mechanical properties of continuous CF/APA6 composites was further explored, and the tensile fracture morphologies of the composites were observed by SEM. The results show that the conversion and crystallinity of APA6 resin decrease with the increase of catalyst ratio. When the fiber volume fraction is 40%, the tensile strength and tensile modulus of the continuous CF/APA6 composite material reach a maximum of 493 MPa and 60 GPa; SEM analysis show that the APA6 resin matrix continues to increase the fiber volume content (>40%) in the carbon fiber, and the weakened interface makes it difficult to play the role of reinforcer.