Hexagonal　boron　nitride　(h-BN)　fibers　with　polyhedral　morphology　were　synthesized　with　a　simple-operational,　large-scale　and　low-cost　method.　The　sample　obtained　was　studied　by　X-ray　photoelectron　spectrometer　(XPS),　electron　energy　lose　spectroscopy　(EELS),　X-ray　powder　diffraction　(XRD),　Fourier　transformation　infrared　spectroscopy　(FT-IR),　etc.,　which　matched　with　h-BN.　Environment　scanning　electron　microscopy　(ESEM)　and　transmission　electron　microscope　(TEM)　indicated　that　the　BN　fibers　possess　polyhedral　morphology.　The　diameter　of　the　BN　fibers　is　mainly　in　the　range　of　100-500　nm.　(c)　2007　Elsevier　Masson　SAS.　All　rights　reserved.