The bryophyte flora of Helan Mountain (China, Inner Mongolia Province) is studied and analyzed. It includes 201 taxa (10 Hepaticae and 191 Musci, including subspecies and varieties) from 77 genera and 30 families. Most of species have a broad North Temperate distribution. With the increase of altitudes and the variation of habitats, the distribution of bryophytes on Helan Mt. shows a clear vertical zonation. Based on our observation, we have classified the zonation of bryophytes in Helan Mountain into 5 altitudinal belts.