Preparation method of self-foaming porous composite bone repair bracket

The invention relates to a preparation method of a treatment material, in particular to a preparation method of a self-foaming porous composite bone repair bracket. The preparation method comprises the following steps: during the synthesis process of a phosphomycin calcium-polyurethane composite, foaming agent water is uniformly compounded in the material in a phosphomycin calcium crystal water form; crystal water is released under a certain condition to react with isocyanato in polyurethane system, so as to generate CO2 gas, achieve self-foaming formation of the composite system, and prepare a phosphomycin calcium-polyurethane composite bone repair bracket with porosity and uniform pores. The in situ self-foaming method is easy and feasible.