Altai Mountains are one of the largest mountain ranges in the Eurasian Continent.The southwest slope of middle Altai Mts.is located in Xinjiang of China,where a lot of temperate element mosses are distributed.During our recent investigation in Altai Mts,we found two new records of Dicranaceae to China——Dicranum brevifolium (Lindb.) Lindb.and Dicranella crispa (Hedw.) Schimp.Both of them were collected in Kanas Nature Reserve and Hemu Kanas Village of Burqin County of the Altai Mts.Geographically,they are only limited in a very small region in China.