Recently, the use of carbon fiber reinforced plastics (CFRP) has been rapidly increasing around the world. There are many used and abandoned CFRP or left remnant carbon fiber in the manufacturing process, however, they have to be recycled for environment. In this study, the long carbon fiber (LCF; 1 cm) surface is modified by fluori-nation and it is used as a reinforcement of epoxy composite to enhance mechanical properties. The surface chemical compositions, mechanical properties and fracture surface morphologies are evaluated. Tensile strength and modulus of the fluorinated LCF/epoxy composites enhanced up to about 21% and 5% compared to that of pristine LCF/epoxy composites, respectively.