In this study, graphene oxide(GO)/hydroxyapatite(HA) composite coatings have been firstly fabricated by a modified electrocodeposition technique on titanium substrate. The microstructure and phase constituents of the composite coatings were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman spectra. The in vitro cellular response was detected by the morphology of MG63 cells which were inoculated onto the coatings. The addition of GO into HA coatings increased the crystallinity of hydroxyaptite. In addition, in vitro cell culture assessment shows a better biocompatibility of the composite coatings compared with the pure HA coating.