Magnesium alloy bone surgical internal fixation and implant material

The invention relates to a magnesium alloy bone surgical internal fixation and implant material. The following adopted technical scheme comprises that a preparation method of the implant material comprises the following steps: a first step, based on a magnesium alloy liquid metal, adding 0.5-1.2% of a titanium element, 0.8-1.5% of a molybdenum element and 0.2-0.4% of a cobalt element, and forming a blank; a second step, making the blank formed in the first step into a magnesium alloy mixed substrate by a pressure casting method, and preparing an orthopaedic internal fixation device semi-finished product with a corresponding shape according to a shape needing to be prepared; a third step, placing the orthopedic internal fixation device semi-finished product in a spraying machine, and spaying the surface of the orthopedic internal fixation device semi-finished product with a biodegradable ceramic, to form a ceramic film layer; and a fourth step, carrying out high temperature curing of the orthopedic internal fi