In order to fabricate porous ceramics with good properties and proper production cost, SiC-Al2O3 porous ceramics were prepared at 1 450 ¡æ for 2 h from the powders of commercial silicon carbide and white fused corundum via a polymeric replication method. Effects of the mass ratio of SiC powder to white fused corundum powder (1¡Ã3, 1¡Ã1 and 3¡Ã1) on the appearance, phase composition, sintering properties and thermal shock resistance were investigated. The research results indicate that the as-prepared SiC-Al2O3 porous ceramics have uniform pores, and their linear shrinkage ratio, apparent porosity and bulk density reach 4.70%, 67.17% and 0.83 g·cm^-3, respectively. The thermal shock cycles from 1 400 ¡æ to room temperature reach 23 including 15 cycles in air cooling condition and then 8 cycles in water cooling condition. Their main phases are α-Al2O3 and Al6Si2O13 as well as a small amount of SiC and free SiO2. The as-prepared porous ceramic with the ratio of m(SiC)¡Ãª©m(Al2O3)=1¡Ã1 possesses prior comprehensive properties.