GRV 022905 is a winonaite recovered from the Grove Mountains in Antarctica. In this study, we employed optical microscopy, scanning electron microscopy with backscattered electron (BSE) image, and electron probe microanalysis (EPMA) to investigate its petrological and mineral chemical features. The meteorite displays typical thermal metamorphic recrystallization features, including abundant triple junctions, while no chondrules or relict chondrules are observed. Mineral chemical analyses reveal that the primary mineral assemblage consists of forsterite (Fa_4.8±0.2), enstatite (Fs_4.5±0.2Wo_2.9±0.1), chromian diopside (Fs_2.3±0.2Wo_41.5±0.5), plagioclase (An_25.5±1.5Ab_70.0±1.2Or_4.5±0.2), kamacite, and minor troilite, with accessory minerals such as schreibersite and apatite. Petrographic and compositional data indicate that the sample experienced FeNi metal-troilite partial melting accompanied by melt migration, resulting in depletion of troilite and low Ni content in kamacite. Textural evidence, such as K-rich feldspar (An_2.3Ab_78.4Or_19.3) filling interstices between other mineral grains and plagioclase enclosing subhedral to euhedral orthopyroxene grains (about 10 μm in size), suggests the occurrence of silicate partial melting. GRV 022905 probably represents a product modified by multiple superimposed thermal events, and its petrogenesis can be interpreted by a three-stage thermal evolution model.