A novel method for preparing biomimetic bioactive calcium phosphate coatings on the electric materials was put forward. In the method the functional groups containing calcium element were first grafted on the surface of the electric materials by sonoelectrochemical method. When the modified materials were dipped into supersaturated calcium phosphate solution for a period of time, the calcium phosphate crystal would grow on the surface. By this technology, bioactive OCP coating has been successfully prepared on carbon/carbon composites, and biomimetic activation was realized on bioinert carbon/carbon composites.