Abstract: Gutianshan Nature Reserve, covering an area of 1368 hectares and with an altitudinal range of 305～1246 m above sea level,is located at 29°20'N Lat.and 118°14'E Long.in Kaihua County,Zhejiang Province.A total of 1164 specimens of bryophytes representing 325 species (including subspecies,varieties and forms),142 genera and 55 families were collected from the Nature Reserve by the first author in October, 1992 and in May,1993.An analysis of geographical and floristic elements of Gutianshan Nature Reserve indicates that 66 species (20.31% of the total) belong to the Old World Tropic elements,119 species (36.62%) to the East Asiatic elements and 86 species(26.46%) to the Eurasia & North American elements.Comparisons between the bryoflora of Gutianshan Nature Reserve and each of those of several other nearby mountain areas (including Huangshan, Tianmushan,Sanqingshan,Wuyanling Nature Reserve) show that the bryofloristic relationship between the bryoflora of Gutianshan Nature Reserve and that of Sanqingshan is the closest of all those the other mountain areas,with a similarity coefficient of 66.98% at the generic level.The bryofloristic relationship between the bryoflora of the Nature Reserve and that of Japan is also very close.The bryoflora of Gutianshan Nature Reserve is a transitional type of the mid subtropical bryoflora in our country,as well as those of Huangshan and Sanqingshan.