The recrystallized SiC was prepared via argon atmosphere sintering with SiC of different particle sizes as raw material and submicron Al₂O₃ as additives, and its phase composition, microstructure, pore size distribution and compression resistance were characterized by means of universal testing machine, X-ray diffractometer, plasma spectrometer, scanning electron microscope and mercury porosimeter. The results show that due to the presence of submicron Al₂O₃, the sintering process of the recrystallized SiC can be differentiated into two stages: liquid phase sintering and recrystallization sintering. The highly active sub-micron Al₂O₃ promotes the formation of liquid phase during liquid phase sintering stage, therewith, the mass transfer mode of SiC changed from diffusion to viscous flow. During recrystallization sintering stage, the mass transfer of SiC at high temperature is dominated by evaporation and condensation, forming Al-containing gas phase and solid solution with SiC, which promotes the crystallographic transformation of the recrystallized SiC, i.e., from 6H-SiC to 4H-SiC. After introducing submicron Al₂O₃, the pore size distribution of recrystallized SiC material changes from unimodal to multimodal, of which, the characteristic peak of small size pores correspond to the course of recrystallization and sintering, whereas, the characteristic peak of large pore size presents the course of liquid phase sintering. At the same time, the SiC grains grow and develop much perfectly with the prolonging of holding time, correspondingly, the SiC grains change from irregular granular to more regular hexagonal structure. However, the decrease of bulk density, the inhomogeneity of SiC grain size and the multi-peak distribution of pore size, so that decrease the compressive strength of the SiC product.