Abstract: Surface chemical deposition coating was used to form single "core-shell" graphite grains with medium coal tar pitch as raw material. Scanning electron microscopy and particle size measurement showed that the surface of the graphite grains was obviously changed and the coating layers were formed first on the edges and corners of a graphite sheet and then extended to the whole sheet surface. X-ray diffraction, infrared spectroscopy and differential scanning calorimetry showed that the coating layers were mesophase pitch.