The invention discloses a ceramic material for false tooth preparation and a preparation method thereof. The ceramic material is composed of straw powder, yttrium oxide, aluminum oxide, zirconia, ceramic powder and a polyvinyl alcohol water solution. The preparation method comprises the following steps: 1. taking the straw powder, yttrium oxide, aluminum oxide, zirconia, ceramic powder and polyvinyl alcohol water solution in parts by weight, adding the yttrium oxide, aluminum oxide, zirconia and ceramic powder into a ball mill, and milling for 2-5 hours to obtain a first mixture; 2. putting the first mixture into a crucible, heating to 1800-2500 DEG C, keeping the temperature for 1-3 hours, adding the straw powder, adding the polyvinyl alcohol water solution, and stirring to obtain a second mixture; and 3. pouring the second mixture into a mold, and carrying out vacuum drying for 1-4 hours. The ceramic material has the advantages of wear resistance, acid/alkali resistance, high hardness and low preparation cost.