The invention discloses a multiplex composite engineering scaffold material capable of gradually decomposing bone tissue and a preparation method thereof. The composite scaffold material consists of calcium phosphate bone cement, biological compatible degradable synthetic high polymer and biological compatible degradable natural high polymer, has better mechanical property and gradient degradation characteristic, and can achieve the aim of regenerating and repairing bone tissue defect by implanting a bone growth factor to induce in-vivo stem cells to be differentiated into bone cells, therebyobviously improving initial strength and toughness of the scaffold material, and ensuring enough strength and toughness of the scaffold material during operating and implanting. After compounded withthe high polymer material, the scaffold has excellent flexibility, so that the scaffold can be subjected to certain machining, such as cutting and the like.