Three-dimensional braided carbon fiber (3D-B CF) reinforced SiC composites were fabricated via infiltration and pyrolysis of polycarbosilane(PCS)/divinylbenzene (DVB). The results show that increasing pyrolysis heating rates can reduce cycle time of manufacturing. At the same time, it can increase the density of C_f/SiC materials and improve the interface between carbon fiber and SiC matrix. The flexural strength of C_f/SiC materials reachs 556.7MPa.