magnesium alloy is easy to process and form, and has excellent comprehensive mechanical properties and unique biodegradability. Magnesium is one of the macro metal elements necessary for the human body. Therefore, magnesium alloy is the best choice for medical metal materials. The modulus of elasticity of magnesium alloy is about 45GPa, which is also close to human bone (10~40GPa), which can effectively alleviate or even avoid the "stress shielding effect"; the magnesium ions released by magnesium alloy in the human body can also promote the proliferation and proliferation of bone cells. Differentiation, promote the growth and healing of bones. Not only that, the processing performance of magnesium alloy is far superior to other types of degradable implant materials such as polylactic acid and calcium phosphate, so it also has clinical application value in cardiovascular stents.