Two-dimensional carbon fiber cloth reinforced silicon oxcarbide (2D C_f/Si-O-C) composites were fabricated with Silicone Resin (SR) as precursors, ethanol as solvent and SiC powder as inert fillers by precursor infiltration and pyrolysis. The effects of the pyrolysis temperature on the microstructure and mechanical properties of 2D C_f/Si-O-C composites were investigated. The results show that the temperature of first cycle has great effect on the mechanical properties of 2D C_f/Si-O-C. The better mechanical properties are attributed to weakening of the fiber/matrix interfacial bonding. When the sixth pyrolysis is carried out at appropriate temperature, the mechanical properties of 2D C_f/Si-O-C composites are enhanced greatly. The flexural strength and fracture toughness of the composites are 263.9MPa and 12.8 MPa?m^1/2, respectively.