The invention relates to a high-performance electronic ceramic which is prepared from the following raw materials in parts by weight: 9-17 parts of nano silicon dioxide, 2-5 parts of barium tetratitanate, 4-9 parts of graphite powder, 2-5 parts of acetylene black, 2-4 parts of nano zirconium oxide, 6-11 parts of silicon carbide, 2-7 parts of tungsten oxide, 8-13 parts of titanium oxide, 6-9 parts of calcium oxide, 3-6 parts of holmium nitride, 7-9 parts of titanium carbide, 8-12 parts of short glass fiber, 1.2-2.4 parts of platinum powder, 2-5 parts of molybdenum powder, 9-12 parts of aluminum oxide powder, 2-4 parts of zinc stearate and 3-7 parts of antimony trioxide. The electronic ceramic has the advantages of stable performance, favorable heat dissipation property, favorable thermal conductivity and low loss, and can be used in many fields.