Abstract: To explore the suitable surface treatment method of carbon fiber and improve the interface bonding effect of carbon fiber fabric reinforced nylon 6 composites, carbon fiber-nylon 6 preforms were prepared by mixing braid, and the preform was socked in different concentrations of alcohol-soluble nylon anhydrous ethanol solution, and finally the carbon fiber fabric-nylon 6 composite was prepared by hot pressing. The mechanical properties, microstructure, heat resistance, crystallinity and crystal form of the carbon fiber fabric-nylon 6 composite were analyzed by universal tensile testing machine, SEM, TGA, DSC and XRD. The results indicate that when preforms are socked at 1wt% alcohol-soluble nylon anhydrous ethanol solution, the carbon fiber fabric-nylon 6 composites have the best mechanical properties, the tensile strength, elastic modulus, bending strength, flexural modulus and impact strength are 449.32 MPa, 5.32 GPa, 657.67 MPa, 44.08 GPa and 138.42 kJ/m², respectively. After the fiber is pulled out, a part of the nylon matrix is adhered to the surface of the single carbon fiber, and the carbon fiber and the nylon matrix form a good interface layer. Compared with nylon 6 fiber, the initial decomposition temperature of carbon fiber fabric-nylon 6 composite material is increased by 13℃, and the heat resistance is enhanced. The nylon 6 resin mainly exists in α crystal form, and the crystallization is perfect.