HowarditeEucriteDiogenite (HED) meteorites, mainly collected in Antarctica and the hot desert of Northwest Africa, are the most abundant achondrite at present. Yiwu 001 reported in this research is an HED meteorite collected in the Yiwu County, Xinjiang Uygur Autonomous Region, China. The systematic petrological and mineralogical characteristics of Yiwu 001 suggest that this meteorite belongs to monomict eucrite. Mineralogically, Yiwu 001 is mainly composed of pigeonite (38%), augite (8%) and plagioclase (46%), and the accessory minerals include silica, troilite, chromite and ilmenite. Based on the grain size of the main minerals, Yiwu 001 is divided into three areas as coarsegrained, finegrained and ultrafinegrained areas, and the average grain size of pyroxene in which is 550 μm, 100 μm and 60 μm, respectively. Texturally, the coarsegrained and partial finegrained areas develop subophitic texture, in addition, the ultrafinegrained and the finegrained areas are characterized by granulitic texture. The coarsegrained basalt (mainly ellipsoid) and elongated ultrafinegrained basalt with oriented structure are surrounded by finegrained basalt matrix. Yiwu 001 with complex postthermal metamorphism should be a basalt containing a small amount of coarsegrained basaltic xenoliths, and the oriented structure may indicate that Yiwu 001 has undergone nearstatic partial melting. Yiwu 001 is classified as Type5 thermal metamorphism based on the exsolution lamella, granulitic texture andtriple junctions.