The invention discloses a high-temperature-resisting low-expansion brake piece. The high-temperature-resisting low-expansion brake piece comprises a steel plate, a heat insulation layer and a friction block; raw materials of the friction block comprise phenolic resin, polybenzimidazole resin, polyphenylene ether ketone, o-cresol formaldehyde epoxy resin, polybutylene terephthalate, high-silicon oxide fibers, quartz fibers, carbon fibers, barium sulfate, nanometer samarium oxide, nanometer aluminum oxide, talcum powder, dialkyl group dithio-generation oxygen molybdenum phosphate, expanded perlite, ZrW2O8 powder, multiwalled carbon nanotube, nanometer aluminum nitride, hexagonal boron nitride, tung oil, nitrogen boron modified silane, brown aluminum oxide and iron powder. The high-temperature-resisting low-expansion brake piece has the excellent high temperature resistance and wear resistance, and is low in heat expansion rate, excellent in heat stability performance and long in service life.