Abstract: The graphene oxide(GO) was deposited on the surface of continuous carbon fiber(CF) by ultrasonic assisted electrophoresis deposition in isopropyl alcohol for the modification of the surface of CF. Then the adhesion between GO and CF was enhanced by high temperature treatment under 200℃, which would increase the interfacial bonding strength of CF/epoxy(EP) composites. The surface morphology and microstructure of the CF before and after modification were characterized by SEM and AFM, and the changes of the surface functional groups of CF before and after modification were tested by XPS. The results show that the tensile strength of the modified CF is increased by 34.58% after deposition of GO and treatment under 200℃. The reason for the improvement is that some partially reduced GO sheets fill or bridge the defects on the surface of CF. At the same time, the adhesion between RGO and CF is enhanced by the linkage of chemical bond after high temperature treatment. And the interfacial shear strength (IFSS) of RGO-CF/EP composites is increased by 69.9%.