In recent years, ceramic-based composites have received attention due to their higher hardness, strength, and modulus of elasticity than metals and polymers, but their manufacturing process and high manufacturing cost largely limit the choice of these composites. Meanwhile, C / SiC composites are considered in new commercial applications due to their high thermal stability, functional properties such as low thermal expansion and good tribological behavior. Of course, weaknesses such as low flexural strength and high production costs of these ceramics have led recent research to address these problems. In this study, first the fabrication and characterization of silicon carbide powder was investigated by sol-gel method. For this purpose, theos material was used as a source of silicon and phenolic resin was used as a carbon source. Then, in the next step, the fabrication and characterization of the carbon / carbon silicon felt composite was studied by sol-gel penetration in the carbon felt prefabricated. In this regard, first by designing the diffusion process, then by passing pyrolysis processes at a temperature of 700 وC and also heat treatment at a temperature of 1600 ?C, C / SiC composite was produced with the presence of small particles of silicon carbide. Then, the microstructure and phasology of the mentioned samples were studied. In the next step, the samples were subjected to molten silicon by siliconization and the carbon / silicon carbide composite was completely fabricated. The results of C / SiC composite fabrication showed that by performing LSI operation on carbon felt, the necessary phases for composite fabrication were formed and the flexural strength of carbon felt was increased from 12 MPa to 62 MPa. It was also proved that the initial coating of fibers using sol-gel method had a significant effect on preventing damage to molten silicon during the siliconization process to carbon fibers.