In this paper, Al2O3/Si foam ceramics with porosity up to 96% were prepared by simple and efficient slurry foaming method, and a large number of SiC nanowires were obtained in Al2O3/Si foam ceramics body by simple and convenient burying sintering process of coke. The growth morophology of SiC nanowires were observed and analyzed by controlling sintering temperature. The microstructure, phase composition, specific surface area, porosity, compressive strength and thermal conductivity of foam ceramics were analyzed and characterized by scanning electron microscope (SEM), X-ray diffractometer, BET specific surface area tester and electronic universal testing machine. The results show that the most SiC nanowires are obtained when sintered at 1 450 ℃. It is also observed that the presence of SiC nanowires change the inherent brittle fracture mode of alumina foam ceramics, and SiC nanowires can effectively promote its crack deflection during compression. In this study, a novel foam ceramics were prepared with three-dimensional network structure of nanowires wound on the hole wall, which provides a new method for in-situ growth of SiC nanowires inside the foam ceramics, and the application of foam ceramics in environmental filtration and catalyst carrier is expanded.