The invention relates to a high-grade cordierite-mullite refractory material for a ceramic kiln and a production process thereof. In the production process, composite silica sol combination is adopted at normal temperature, and cordierite combination is formed by reaction and sintering of magnesia-alumina spinel micropowder and silicon dioxide at high temperature. The refractory material comprises the following components in percentage by weight: 20-40% of molochite with particle size of 1.2-0.5mm, 10-25% of molochite with particle size of 0.5-0.088mm, 0-15% of synthetic cordierite with particle size of 0.5-0.088mm, 10-35% of synthetic cordierite with particle size less than 0.088mm, 1-3% of magnesia micropowder, 2-8% of alumina micropowder, 3-10% of silica fume, 0-15% of calcined kaolin micropowder, 0.01-0.1% of third-generation water reducer and 4-8% of water. The refractory material has good shaping performance and excellent sintering performance; and according to the invention, the difficulties that the cordierite-mullite product prepared by die pressing and extrusion shaping is easy in blank breakage and difficult to sinter are solved, and the refractory material product with high purity, high strength, and good high-temperature resistance and thermal shock resistance is prepared.