continuous alumina fiber is the main raw material of a new generation of hightemperature resistant hot-end components due to its high melting point, low thermal conductivity, good insulation, strong resistance to chemical erosion and high specific strength. This material is used to prepare high-temperature-resistant, high-strength, anti-heat-insulating ceramic matrix composite materials, which are widely used in high-end fields such as aviation, aerospace, shipbuilding, thermoelectricity, petrochemicals, semiconductors, automobiles, and high-temperature furnaces. Alumina fiber and its composite materials abroad have been commercialized and implemented in component applications. Significant strides has been made domestically in this field over the past decade by transitioning from basic research to applied research. This paper summarizes the research progress on preparation, industrial layout of alumina fiber and its composites.Finally, the key problems and future development emphases of the alumina fiber and its composites are proposed.