Abstract: Graphene/polyaniline(RGO/PANI) conducting composites were synthesized using graphene oxide with 1 nm thickness, synthesized by ultrasound-assisted Hummers method, as the oxidant. AFM, SEM, FTIR and XRD were employed to characterize RGO/PANI composites. The results show that graphene oxide(GO) nanosheets can be readily reduced by aniline in an aqueous acid medium at the temperatures just above room temperature, while simultaneously aniline undergoes an oxidative polymerization by oxidability of oxygen functional groups on GO to produce RGO/PANI conducting composites. When the amounts of GO and aniline in the reaction are 0.1 g and 1 mL respectively, the best conductivity of the prepared RGO/PANI composites is 10 S/cm.