The Xining Basin bears a continuous Cenozoic fluvio-lacustrine sequence over 2000 m thick. It not only records the Cenozoic tectonic uplift at the northeastern Qinghai-Tibet Plateau but also preserves high-resolution paleoclimatic data, acting as a key window for studying Cenozoic tectono-climatic coupling. Paleontological fossils are reliable proxies for paleoclimates. Previous studies identified successive fossil assemblages (Xiejia, Danshuilu, Diaogou Faunas) in different horizons, providing direct evidence for stratigraphic division. However, existing records are dominated by small mammals, limiting detailed stratigraphic framework construction. This study surveyed the Neogene Miocene Xianshuihe Formation (N?x) near Banyan-Jiangjiagou, Huzhu County. Dental/horn fossils of *Gazella gaudryi* and dental fossils of *Hipparion coelophyes* were obtained, shedding light on the paleoclimate of the northeastern Qinghai-Tibet Plateau.