Silicon carbide fiber reinforced silicon carbide matrix （SiC_f/SiC） composite had an important application in hot-section componets in aeroengines.SiC_f/SiC composite was fabricated by melt infiltration （MI） technique using SiC fibers as reinforcement. Physical and mechanical properties of the composite were evaluated and the microstructure and cross section was studied by Micro-CT and SEM.The results show that the bulk density of SiC_f/SiC composite is 2.78 g/cm³ and the apparent porosity is lower than 2.0%. The transverse thermal conductivity at 1 200 ℃ is 14.30 W/（m∙K） for the prepared composite. The linear expansion rates in thickness direction and in-plane direction are 0.59% and 0.56% and the average coefficient of thermal expansion are 5.02×10^-6/K and 4.73×10^-6/K， respectively. The representative values of in-plane tensile strength， flexural strength and interlaminar tensile strength of SiC_f/SiC composite are 317 MPa，794 MPa and 49 MPa， respectively.It is clearly observed that many fibers are pull out of the ceramic matrix from the SEM image of fracture surface of tensile specimen.