Compared with the ex-situ method, the particles prepared by in-situ method exhibited the characters of small size, clean particle-matrix surface and high strength of the particle-matrix interface, which makes aluminum(Al) matrix composites have the advantages of high specific strength and high specific modulus as well as good strength and plasticity matching. Therefore, in situ Al matrix composites are one of the ideal materials for lightweight design of aerospace structural parts. In this paper, the research status of in-situ TiB₂ particle reinforced Al matrix composites was summarized from three aspects: preparation, optimization design of component ratio, mechanical properties and strong mechanism. Meanwhile, the existing problems and future development direction of the present composites were analysed, in order to promote the rapid development of in-situ TiB₂ particle reinforced Al matrix composites in the civil aviation passenger aircraft and other aviation high-end fields.