Abstract:In this study, bryophyte investigation and specimen collection were carried out on the north slope of Dabie Mountain in Anhui Province for four times from 2019 to 2021. Based on the identification of 1 517 specimens collected and published literatures, the bryophyte composition and floristic composition in this area were studied. At the same time, the attribution of bryophyte flora on the northern slope of Mt. Dabie were explored through comparison with bryoflora of east, north and central China. The results showed that: (1) a total of 482 species (including infraspecific taxa) of bryophytes belonging to 180 genera and 80 families were in the study area, and 206 species, 40 genera and 12 families were added to the survey, among which 9 species were new additions to Anhui Province. (2) Two threatened bryophytes were found, Glyphomitrium minutissimum belonging to CR and Bryum bornholmense belonging to VU. (3) There were three worldwide monotypic families, 14 monotypic genera and 34 oligotypic genera (2-6 species), accounting for 26.67% of the total genera, which reflected the ancient and primitive nature of the bryophyte flora in the area. (4) The bryophyte flora in this area was complex and diverse, of which North Temperate components (26.43%) and East Asia components (24.89%) were predominant, followed by Tropical Asia components (14.54%). (5) The bryophyte flora of this area was most closely related to the flora of east China (The western Tianmu Mountain, Qingliangfeng National Reserve and Yangjifeng National Reserve), because of its similar geoclimatic characteristics and species composition. Show that, the bryophyte flora of the northern slope of Mt. Dabie should belong to the flora of east China.