Low density carbon bonded carbon fiber composites are thought to be attractive candidates for thermal insulation applications in aerospace due to their unique properties such as low density, high temperature stability and low thermal conductivity. In the present work, an anti-oxidation low density carbon bonded carbon fiber composite was designed and fabricated for high temperature application. Firstly, PyC coating was deposited uniformly on the surface of carbon fibers to improve the mechanical properties of CBCF through CVI process. After deposited for 210h, the tensile strength and pressure strength in thickness was increased by 275% and 341%, respectively. Then, a dual-layer coating was designed and prepared to improve the oxidation resistance of CBCF. High temperature oxidation properties under different temperature were tested using a high temperature muffle furnace in air. Results show that the as-prepared oxidation coating could protect composites effectively under high temperature oxidation conditions. After oxidized at 1700~1750℃ for 300~360s, the mass ablation rates was about 1.1~1.5′10_-5g/(s.cm₂). The formation of a dense glass layer of SiO2 or SiO2 embedded with HfO2 was responsible for the good ablation resistant.