Yak (Bos grunniens) is one of the largest ungulate in China, found in the central and eastern cold pastures of Qinghai-Tibet Plateau. The number of wild yaks has declined considerably in recent decades due to widespread hunting. In this paper we discussed the distribution of the Yak, based on the available literature and our field investigation on the Qinghai-Tibet Plasteau, to provide basic knowledge and promote the conservation of this animal.