Abstract: Mainly explored were two kinds of hybrid composites with different diameter fibers — SiCF-CF/epoxy and BF-CF/epoxy composites. First, analysed was the influence that preparing pressure acted on range and volume content of hybrid fibers. Then, further studied were the hybrid effect of compression and bending properties by using unidirectional small size composites and the contribution that fibers affected the compression and bending properties of materials.