Preparation method of zinc alloy surface nano zinc oxide biological coating

The invention belongs to the field of biomedical material surface modification, and mainly comprises a method for regulating and controlling the degradation behavior of a zinc alloy material. The surface of the zinc alloy is modified by adopting an anodic oxidation method, nano-zinc oxide biological coatings with different morphological structures and the thickness smaller than 200 microns are formed on the surface of the zinc alloy by regulating and controlling anodic oxidation parameters, and the degradation rate of the zinc alloy is regulated and controlled under the condition that the excellent mechanical property of the zinc alloy is reserved. Anodic oxidation parameters are regulated and controlled according to the requirement for the recovery period of an implanted part, the degradation rate of implanted instruments such as a bone fixator, a uterine cavity stent and a cardiovascular stent is controllable, the implantation requirement is met in the service period, degradation is completed after service,