The preparation of SiBNC ceramic oxidation-resistant coating on carbon fiber via precursorsolution infiltration and pyrolysis (PIP) method was presented and discussed in detail. Moreover, the microstructures and the components of the coating were characterized. The experiment results showed that the 0.5％ polyborosilazane (PBSZ) solution in the coating preparation gave fewer defects, in contrast with the 1％ and the 5％ PBSZ solutions. The strength of the carbon fiber coated with SiBNC-0.5 wt％ (3.08 GPa) was decreased by 12％. Compared with uncoated carbon fiber, the starting oxidation temperature and the reaction activation energy of the coated carbon fibers (SiBNC-0.5 wt％) have increased by about 300 ℃ and 104％, respectively. The oxidation resistance of the SiBNC coated carbon fiber was improved dramatically.