Abstract: Some specimens of arvicolid rodents were collected from the Hexian hominid site but not recorded in the list of the original mammalian fauna (Zheng Shaohua, 1982, 1983) and Huang Wanbo et al., 1982) due to their particularity unknown at that time. The genus Hexianomys named by these specimens in the monograph about the mammalian fauna from the Hexian hominid site was first mentioned by Zheng and Li in 1990 and quoted by Repenning et al. at the same time and by Zheng and Han in 1991. The name Hexianomys, however, has become invalid with the delayed publication of the monograph. In order to avoid further confusion, I have to. use a new generic and species name Huananomys variabilis to replace the previous Hexianomys complicidens and offer independently it in this paper considering its important position in the Arvicolidae. The material of this new genus in the literature include those from not only the Hexian but also the Tianqiao locality of Guizhou. In this paper, the stress will be put on the description of the specimens from the Hexian hominid site.