High-strength absorbable composite active internal fixation device and preparation method therefor

A preparation method for an internal fixation device, comprising the following steps:

• 1) providing a first mixture, wherein the first mixture contains bioactive nanoparticles, a catalyst and biomedical grade monomers;
• 2) conducting polyreaction to the first mixture to obtain a first polymer;
• 3) conducting granulation to the first polymer;
• 4) injecting a granulation product into an injection molding machine to form a first blank by injection molding;
• 5) annealing the first blank to obtain a second blank;
• 6) conducting extrusion molding to the second blank, and conducting precision machining to the product obtained to prepare an internal fixation device.