According to the field investigation and record in foretime, there are 46 species of mammals belonging to 8 orders, 21 families, in Diaoluoshan, Hainan. Eight species, Crocidura rapax,Cynopterus sphinx,Rhinolophus pusillus,Myotis chinensis,Miniopterus magnater,Pipistrellus pulveratus,Rattus brunneus and Niviventer confucianus are new record in Diaoluoshan. Two species Hylobates concolor and Neofelis nebulosa are the 1st class protected wildlife of national importance; nine species, Macaca mulatta,Selenarctos thibetanus,et al. are the 2nd class protected wildlife of national importance; fourteen species of them are "Available having economic value and having research value" animals. Eighteen species can be found in "China Red Data Book of Endangered Animals"; six species can be found in IUCN Red Data Book. Neohylomys hainanensis, Petaurista albiventer are local species in Hainan. Twelve species, Hylobates concolor, Mogera insularis, Rhinolophus affinisis,et al. are local subspecies in Hainan.