Abstract: The present paper describes one species of dormouse Microdyromys wuae Qiu, 1996 and two new species of gerbils Mellalomys gansus sp. nov. and Myocricetodon plebius sp. nov. collected from the upper Xianshuihe Formation at Quantougou, Gausu, followed by a discussion of the Quantougou Fauna biochronology, biogeography and paleoecology. Gerbils in this fauna represent the earliest record of the family Gerbillidae in China. Faunal correlation indicates that the Quantougou Fauna resembles the middle Miocene Tunggur Fauna of Nei Mongol (Inner Mongolia) both chronologically and ecologically. The occurrence of gerbils at Quantougou suggests that the Quantougou Fauna was adapted to a more xeric open habitat than the Tunggur Fauna.