The invention relates to a ceramic tool material, in particular to a tungsten titanium carbide-based ceramic tool material added with cubic boron nitride and a preparation method of the material. The tungsten titanium carbide-based ceramic tool material added with cubic boron nitride is characterized by being prepared from, by mass, 80%-84% of micron tungsten titanium carbide, 1%-5% of nano cubic boron nitride and 15% of nano cobalt. According to the tungsten titanium carbide-based ceramic tool material added with cubic boron nitride, the material is prepared by adding nano cobalt powder serving as a binding phase and c-BN serving as a reinforcing phase in a tungsten titanium carbide micron ceramic substrate for sintering, due to the fact that transition metal carbide can be combined with a small energy band gap through a high covalent bond, the transition metal carbide achieves lots of excellent properties such as high hardness and good wear resistance, and therefore the transition metal carbide represented by (Ti,W)C not only can serve as a wear-resistant structural component in an automobile engine but also can serve as a cutting tool and be for military use.