The invention discloses a heat radiator ceramic material. The heat radiator ceramic material is formed through grinding components and carrying out injection molding, and the components comprise 15-20 parts of aluminum silicate, 100-120 parts of aluminum nitride, 5-8 parts of silica, 8-12 parts of basic magnesium carbonate, 6-10 parts of zinc oxide, 10-12 parts of titanium dioxide, 5-8 parts of bentonite, 10-15 parts of nano-kaolin, 10-12 parts of talcum powder, 6-8 parts of limestone, 8-15 parts of active silicon micro-powder, 12-15 parts of mica powder and 10-15 parts of an injection molding agent. The heat radiator ceramic material using a composite ceramic material as an LED lamp heat radiator has good heat conduction performance and insulation property, and is safe and environmentally-friendly. The composite ceramic material has the environment heat conduction performance of a metal material, also has the radiation heat conduction performance not belonging to the metal material, and is a nonmetal material with the insulation property.