Using tabular alumina as aggregate, tabular alumina fines, reactive alumina ultra-fines, aluminum powders, silicon powders, carbon black, flake graphite, B4C and zircon fines as matrix, low carbon Al2O3-C refractories were prepared. Influences of zircon powders additions (0, 3%, 5% and 7%, in mass, the same hereinafter) on properties, phase composition and microstructure were investigated. The results show that the ZrO2-nitride can be in-situ formed through carbothermal reduction and nitridation in Al2O3-C refractories. With the increase of zircon powder, the oxidation resistance of the Al2O3-C refractories improves obviously, the oxidized layer thickness decreases from 7.94 mm without zircon to 2.71 mm with 5% zircon. HMOR at 1 400 ℃ of the Al2O3-C refractories reaches the maximum 14.9 MPa when zircon addition is 5%. With the increase of zircon powder, the apparent porosity and bulk density change a little, CMOR and CCS increase.