Abstract: Yuanqu Basin in cenfral China is well-known for its rich Eocene mammals not only in China but also in the world. More than half a century workers both from China and abroad have done a lot in geology and paleontology. In recent years we found many important fossils not only in the old localites but also in several new ones. Among these new localites Huoshipo near Guojiazhuang Village, Wangmao Town, Yuanqu County is the most important one, where new primate and carnivorus fossils have been found. Hyrachyus sp., ? Lushilagus sp. and Propterodon irdinensis as well as primitive rodents existed in this locality demonsüate that there may be Middle Eocene Irdinmanhan deposit in Yuanqu Basin, which was unknown in the past In the present paper these new and important localites and fossils ar briefly introduced, and the whole and complete faunal lists (? middle Middle Eocene Irdinmanhan Guojiazhuang Fauna, late Middle Eocene Sharamurunian Rencun Fauna, latest Middle Eocene Naduan Zhaili Fauna and ? Late Eocene Ulangochuan Nanbaotou Fauna) so far known are proposed (see Chinese text).