At present, the application of artificial bone is greatly limited due to its poor mechanical properties. Therefore, it has become a research interest to obtain the artificial bone with improved mechanical properties, while its original piezoelectric and biological properties are maintained. In this paper, in order to improve the mechanical properties of the composite while keeping the electrical properties unchanged, the carbon fiber/barium titanate-hydroxyapatite (Cf/BT-HA) composite was prepared by traditional solid-phase sintering method using barium titanate-hydroxyapatite (BT-HA) composite as matrix and carbon fiber (Cf) with 5% (mass fraction) as reinforcement. The results show that the electrical properties remain unchanged and the mechanical properties are greatly improved after adding Cf into the composite. The samples possess excellent ferroelectric properties, the piezoelectric constant d33 is 37 pC/N, and the Curie temperature is 170 ℃, which is higher than the artificial bone service temperature. The bending strength is 121.7 MPa, and the hardness is 3.56 GPa, both of which are three times of the original. The fracture toughness is also doubled, reaching 1.21 MPa·m1/2. Cf/BT-HA composites have no cytotoxicity and good osteoinduction. It is found that Cf/BT-HA composites would be a promising bone substitute material.