A composite material for bone repair based on a decellularized biological tissue matrix material and a preparation method thereof. The composite material for bone repair comprises an organic phase of a microfibrillar decellularized animal tissue matrix material and an inorganic phase of a calcium salt bioceramic or other inorganic bioglass. A preparation process for the composite material for bone repair does not need physical or chemical crosslinking. The composite material for bone repair has a three-dimensional porous network structure, and protein components in the biological tissue matrix material maintain a natural triplex structure. The composite material for bone repair has excellent biocompatibility, biodegradability, osteoconductivity, osteoinductivity, and osteogenecity, also has certain mechanical strength and shape memory function, and can be used as a bone filling material or a repair material for large-area bone defect.
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