A magnesium titanate oxide film implant, and a method for preparing the same. The magnesium titanate oxide film implant is prepared by forming a titanium oxide film (a magnesium titanate oxide film) in which magnesium is incorporated into the surface of titanium or a titanium alloy. A magnesium titanate oxide film implant is prepared by irradiating UV light on an implant body made of titanium or a titanium alloy in distilled water, dipping the UV light-irradiated implant body in an electrolyte solution containing magnesium, and coating a magnesium titanate oxide film on the dipped implant body by anodic oxidation. Therefore, the present invention can provide an implant having increased bioactivity of a titanium oxide film formed by anodic oxidation, and provides an optimum magnesium titanate oxide (Ti.sub.xMg.sub.yO.sub.z) thickness for successful osseointegration of the magnesium titanate (Ti.sub.xMg.sub.yO.sub.z) implant.