Different colors of oxide films were prepared directly on the TA2 pure titanium by constant voltage anodic oxidation in phosphate acid .The micro-morphologies, composition, components and valence bonds of the colored films were characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Energy disperse spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Tafel polarization curves and EIS of the colored films were studied by electrochemical workstation in Hank’s simulated body fluid. The SEM results show that the colored films of pure titanium after anodic oxidation are composed of porous surface and inner dense of oxide. The XRD study shows that the films are possessed of the amorphous structure of titanium dioxide. The XPS results indicate that the films are composed Ti4+ and O2-. With increasing of the voltage, the corrosion potential of colored films increases and corrosion current density decreases according to the Tafel polarization curves. The EIS exhibits that capacitive loop radius are enlarged and impedance values are increased with the increase of voltage, thus the corrosion performance of colored films is improved.