In this paper, we managed to fabricate novel mercapto functional silica sol-gel composite coatings reinforced by Graphene without extra chemical modification to achieve more excellent anti-corrosion performances on copper surface.Mercapto functional silica organic-inorganic hybrid solution with 30% solid content was prepared by means of hydrolysis-condensation reaction.Tetraethylorthosilicate(TEOS), (3-Mercaptopropyl)trimethoxysilane(MPTMS) and formic acid were used as inorganic precursor, organic precursor and catalysts respectively.Then Graphene without chemical modification were added to the solution to obtain the composite solution.Finally, the mercapto functional silica sol-gel composite coatings on copper surface were prepared via immersion and curing treatment.The chemical structures of the composite coatings and Graphene fillers were characterized by Flourier transform infrared spectroscopy and X-ray photoelectron spectrometer.The surface and cross section morphologies of the composite coatings were investigated by field emission scanning electron microscopy while the morphologies of the Graphene fillers were observed using atomic force microscopy.The thermostability and hardness were investigated with the help of baking test and pencil hardness tester.The corrosion resistance performances were measured by electrochemical workstation.The results revealed that the thermostability and hardness of the sol-gel composite coatings were effectively improved on account of the addition of Graphene.The corrosion resistance reached its optimum value as the content of Graphene was 0.5 %.