The invention relates to a medical
metal material with a modified film with photo-thermal characteristics on the surface and a preparation method and application of the medical
metal material. And the modified film is a
nickel-
titanium oxide TimNinO2m + n embedded with nano
nickel. The nano
nickel is a simple substance and is spherical, and the
radius of the nano nickel is 2-20 nm; and the density of the nickel nanoparticles is 5-30 per square micron. The nickel-
titanium oxide is of a
sheet structure, the length and the width of a sheet layer are 0.5-2 microns, and the thickness of the sheet layer is 10-40 nm. In the preparation method, the nickel-
titanium layered double
hydroxide is firstly generated, and then the nickel-
titanium oxide thin film inlaid with the elemental nickel is obtained through heating reduction. The cost of the constructed nano nickel is obviously reduced, and meanwhile the problems that non-
noble metal nano
metal particles are prone to being oxidized, and the photo-
thermal effect cannot be kept for a long time are effectively solved; and the material also has good osteogenesis performance, improves the
biological activity of medical metal, and is suitable for
surface modification of
hard tissue implantation instruments.