The invention discloses a cast Ti-Si eutectic alloy containing an intermetallic compound reinforcement phase, belonging to the field of a metal material. The cast Ti-Si eutectic alloy comprises the following components in percentage by weight: 8.51-11.5% of Si, 3-9% of Al, 0.5-5% of V, 0.01-0.25% of B, 0.3-10% of stable beta-phase additional elements Mo, Nb and Ta, and the balance of Ti and inevitable impurities. Ti-Si-Al-V-B is taken as basic alloy system and the performance optimization is realized by adding Mo, Nb and Ta and other elements. The alloy has superhigh strength, good high-temperature anti-oxidization and high-temperature wear resistance properties by utilizing high Si content and through optimized cooperation between Si and elements Al, V, Mo, Nb, Ta and B. The maximum compression strength of the Ti-Si alloy is more than 2100MPa, and the hardness is 50HRC. The alloy is suitable for manufacturing parts requiring high temperature, wear resistance, corrosion resistance in the fields of aerospace, automobile, ships and warships, and the like.