Using the methods of field investigations,indoor data statistics and reference compiling,we studied the pteridophyte flora in Qomolangma National Nature Reserve.The result showed that:(1)There are 193 species in this Nature Reserve,belonging to 59 genera and 31 families,respectively.Their dominant families are Dryopteridaceae（51），Polypodiaceae（41），Athyriaceae（22） and Aspleniaceae（10）,while the dominant genera are Polystichum（27），Dryopteris（20） and Lepisorus（17）.(2)There are eight familyareal types dominated by Pantropical type and 14 generaareal types dominated by Pantropical and SinoHimalayan.types.The habitattypes are most of compositions of authochthonal,following by the compositions of lithophilous and adnascent pteridophyte.We do not found any kind of hydropteridales in this reserve.(3)The flora of Qomolangma National Reserve has strong phylogenetic relationship with the Mt.Namjagbarwa region,following by the Kongpo Nature Reserve and the Hengduan Mountains and Nepal.The floristic composition of this reserve is also similar to the Jiuzhaigou National Nature Reserve and Qinling Mountain Range,whereas has weak relationship with Xishuangbanna area.