Diverse topography and complex landforms occurred China, and the geographical distribution of animal exhibits significant differences across geographical regions. Based on literature research, the latest species diversity data, 692 species (belonging to 13 Orders, 56 Families and 246 Genera) of mammals in China were obtained. By using multivariate similarity clustering analysis (MSCA) method, zoogeographical distribution of mammals in China was analyzed according to 639 species (13 Orders, 49 Families, 215 Genera). The results showed that: 1) current zoogeographical distribution of mammals in China was categorized into 176 investigated geographical units (IGUs), and then merged into 63 basic geographic units (BGUs); 2) when taking the similarity coefficients values of 0.31, 0.25, and 0.15, the basic geographical units of mammals in China could be clustered into 10, 7 and 2 groups of BGUs, respectively. Consequently, a 3-level zoogeographical division, 2 Realms, 7 Regions, and 10 Sub-regions, of mammalian distribution of China was established. The result from this study suggested that the boundary between the Palaearctic and Oriental Realms within China in the World zoogeographical distribution Division should be seated in line with western Namjagbarwa Peak - Maqinggangri - northern Qinling Mountains - southern margin of Loess Plateau - Dabie Mountains - southern Huaihe River
area- middle and lower reaches of Yangtze River.