The invention discloses a ceramic grinding section for a cement ball mill, and a preparation method thereof. The ceramic grinding section for the cement ball mill comprises the following raw materials in weight percentage: 92-95% of alumina, 0.5%-2% of silicon nitride, 0.8-3% of kaolin, 0.2-2% of titanium carbide, 1.5-2% of nano boron carbide, 0.8-1% of titanium nitride, and 0.3-2% of tantalum carbide. The ceramic grinding section is in the shape of a ball-column combination body, a corner-rounded cylinder or an up-and-down symmetrical type regular square pyramid. The ceramic grinding section is prepared through the compression moulding and high-temperature sintering process. The preparation method comprises the steps of burdening, ball-milling, spray granulation, ageing in a stock bin, compression processing, high-temperature sintering, powder removing, polishing, finished product drying, and the like. The ceramic grinding section for the cement ball mill has the advantages of high hardness, high wear resistance, high temperature resistance and the like. Meanwhile, the ceramic grinding section is extremely excellent in shock resistance, wear resistance and anti-impact performance.