Abstract: Al₂O₃-C materials were prepared using high-alumina bauxite clinker as the primary raw material, flake graphite as the carbon source, metallic silicon and silicon carbide as additives, and phenolic resin as the binder, with varying proportions of reactive alumina micropowder incorporated. The particle size distribution, bulk density, and flowability of the granulated feedstock, along with the cold modulus of rupture, apparent porosity, bulk density, permanent linear change after heating, hot modulus of rupture, thermal expansion, and thermal shock resistance of the Al₂O₃-C materials, were measured in accordance with relevant standards. This study investigated the effect of reactive alumina micropowder addition on the properties of Al₂O₃-C refractories for the three major continuous casting components, based on a formulation with high-alumina bauxite clinker as the main raw material and the mass fraction of graphite is 23%. The results indicated that with increasing reactive alumina micropowder content, the granulation quality and flowability of the Al₂O₃-C granules first improved and then deteriorated. Incorporating reactive alumina micropowder into the Al₂O₃-C refractories reduced the apparent porosity and enhanced the bulk density, cold modulus of rupture, and hot modulus of rupture. Following heat treatment at 1 100 ℃ and 1 600 ℃, all samples exhibited varying degrees of shrinkage, with the linear shrinkage increasing progressively as the reactive alumina micropowder content increased. Moreover, with higher additions of reactive alumina micropowder, the thermal expansion coefficient of the high-alumina bauxite clinker-based Al₂O₃-C refractories gradually increased, while their thermal shock resistance progressively deteriorated.