The present invention relates porous osteoinductive nanocomposites and for the methods to prepare osteoinductive nanocomposites. The osteoinductive composites consist of biocompatible polymers and non-heated (or non-sintered), needle-shaped or plate-like calcium phosphate nanocrystals and the methods comprise the steps of: a. adding phosphate to a calcium solution thereby evoking precipitation of calcium phosphate nanocrystals； b. washing the nanocrystals with water and suspending them in an organic solvent or getting dry calcium phosphate nanocrystals after evaporating organic solvent； c. adding polymers (previously dissolved in an organic solvent) to calcium phosphate nanocrystal suspension, rotational mixing of the components using beads, mixing with porogenic agents, moulding the composite material and evaporating of the organic solvent； or mixing polymers (not dissolved in an organic solvent but raw powder), dry calcium phosphate nanocrystals and porogenic agents with melting intrusion and moulding the composites； d. leaching porogenic agents in water.
