The invention discloses a composite ceramic mold material preparation method, and belongs to the technical field of mold materials. According to the present invention, dimethyl dichlorosilane, tung oil and barium chloride are subjected to pre-heating mixing under the protection of mixed gas, a reaction is performed by adopting the high temperature released by instant combustion of magnesium bar as the reaction condition, a freezing treatment is performed, the obtained material, sodium tungstate, graphite and the like are mixed, the obtained mixture is subjected to high temperature calcinations, acid leaching impurity removing is performed, the obtained material, zirconia and other auxiliary materials are mixed, screening is performed, the screened material is placed into a graphite mold, and calcination is performed to obtain the composite ceramic mold material; and the composite ceramic mold material is prepared by using the self-made composite ceramic mold material base material, such that the hardness, the bending resistance, the toughness and the corrosion resistance of the composite ceramic mold material are increased, the problems that the bending strength of the traditional ceramic mold material is not high and the traditional ceramic mold material easily produces brittle fracture during the use process are overcome, and the broad application prospect is provided.