Ceramic heat sink is mainly composed of a heat dissipation layer and a heat conduction layer, the heat dissipation layer is the use of liquid phase chemical change principle to latex slurry uneven dispersion, the formation of ceramic powder thin structure, and combined with sub-micron powder, and then fired into hollow crystal cavity structure heat dissipation layer, the porosity of the micro cavity structure of the heat dissipation layer between 5% and 40%, The particle size of the powder is between 90 nm and 300 nm. The contact surface with the heat source has a thermal conductivity layer, which absorbs and conducts the heat source. Through the high surface area of the porous structure of the heat dissipation layer, the heat dissipation capacity is improved by using the air as the heat dissipation medium.