Abstract: The mammals in the Jiudingshan Nature Reserve were surveyed from 2013 to 2015. It was found that there were 82 species belonging to 27 families,4 orders. Analysis results showed that in the Reserve, 62 species belonged to Oriental realm,14 species belonged Palaeartic realm and 6 species belonged widely distributed species. The Oriental reatm species were dominat. Among them,7 species were national firstgrade protected animals and 13 species were national second-grade protected animals in the Reserve.