Vesta is the largest silicate asteroid in the solar system, and its rock samples (HED meteorites) are among the oldest magmatic rocks in the solar system, possibly recording important information about the earliest geological fluid activities of terrestrial planets. For the first time in this work, a thicker and longer Fe-rich olivine vein was found in a piece of unbreccia equilibrium Eucrite NWA 11592. Through detailed research of petrographic and geochemical characteristics of the NWA 11592 meteorite, NWA 11592 is classified as basaltic unbreccia Eucrite, with an impact metamorphism degree of at least S4 and a thermal metamorphism degree of type 6. The Fe-rich olivine veins in NWA 11592 is most likely to be the precipitation products of H₂O-bearing fluids along the fractures. The reaction system should be open and relatively oxidized (f_O2 up to IW+0.9), and it should occur at a burial depth of > 4 km in the shallow crust of Vesta. The infiltration of H₂O-bearing fluids not only occurs more on the surface or near the surface of Vesta, but may also occur in the shallow crust of Vesta's interior.