The reinforced concrete center pull out specimens were prepared by 4different diameters(14, 18, 22, 25mm) and 4different coating(3graphene/epoxy coatins and the control). The effect of content of graphene in graphene/epoxy coating on the bonding performance of reinforced concrete was observed. The results show that the bonding performance between graphene/epoxy coated steel bars and concrete is worse than that of control. The ratio of the ultimate bond strength between coated reinforced concrete and the control decreases as the diameter of the steel bars increases. The content of graphene has little effect on the bonding performance of graphene/epoxy coated steel bars and concrete. Pull out failure occurred in two groups of specimens with a steel bar diameter of 14mm, and splitting failure occurred in the other groups of specimen. In practical engineering, graphene/epoxy coated steel bars can be applied according to the specifications of ordinary epoxy coated steel bars.