Self-degradation bioactive metal anchoring nail and preparation method thereof

The invention relates to a self-degradation bioactive metal anchoring nail which belongs to the technical field of biomedicine. The self-degradation bioactive metal anchoring nail is made of magnesium or magnesium alloy, and the outer surface of the self-degradation bioactive metal anchoring nail can be optionally provided with a bone-like apatite coating. The magnesium alloy comprises the following components in percentage by mass: one or a plurality of 0.01-10% of Zn, 0.01-5% of Ca, 0.001-5% of Fe and 0.01-5% of Mn, and the balance of Mg. The invention basically ensures the biosafety. The magnesium or magnesium alloy matrix can be simultaneously provided with the bone-like apatite coating, thereby promoting the bone repair, enhancing the fixing strength, and overcoming the defects in the permanent implant metal anchoring nail and the degradable polymer anchoring nail. The self-degradation bioactive metal anchoring nail can better achieve the goals of healing and repairing of tendons and bone, achieve favorable tracing performance, and meet the requirements for comprehensive mechanical properties and biosafety of anchoring nail materials.