A new genus of comb-tailed spider (Hahniidae), Sinahahnia gen. nov., is described based on three new species from the high-altitude areas of China: Sinahahnia eyu sp. nov. (♂♀, Chongqing and Hubei), S. fanjingshan sp. nov. (♂♀, Guizhou), and S. yintiaoling sp. nov. (♀, Chongqing). Digital images, illustrations, and a distribution map are provided.