Abstract: The green bodies of carbon nanotubes/ hydroxyapatite (CNTs/ HA) composite were prepared by gel casting process. The effect s of p H , dispersant , content of solid in slurry and the dispersing process on the slurryand the properties of the green bodies were researched. The mechanical properties were tested , and the microst ructure was analysed using SEM. It is found that the p H value of the slurry should be cont rolled in the range 10 to 12.The fluidness of HA slurry is the best as the concent ration of NH_4- PMAA is 0. 6 %. The viscosity of CNTs/ HAslurry reaches the lowest value as the concent ration of sodium dodecanesulphonate which is called SDS for shortchanges f rom SDS/ CNTs = 1 % to SDS/ CNTs = 2 %. The content of solid in CNTs/ HA slurry reaches 55 % and thebending st rength of the green bodies of CNTs/ HA composite reaches 57. 403 MPa by a ball mill process.