Preparation method for anti infectious nano collagen/ calcium phosphate bone repair material

The invention discloses a preparation method for an anti-infectious nano collagen/ calcium phosphate bone repair material, and belongs to the field of biomedical materials. The method comprises the following steps of: slowly dripping solution containing calcium ions and aqueous solution containing phosphate radical ions into acid-soluble collagen solution, dripping NaOH solution to regulate the pH value, performing freeze drying, grinding to obtain dry powder for later use, dissolving poly-L-lactic acid in 1,4-dioxane, stirring for a certain time, mixing the solution and the dry powder uniformly, finally adding vancomycin, stirring uniformly, removing the solvent by adopting a freeze drying method, and preparing the anti-infectious nano collagen/ calcium phosphate bone repair material. The prepared bone repair material has excellent biocompatibility, infection resistance and a micro-structure similar to human body.