Abstract: Guanwu Mountain Provincial Nature Reserve is located in Jiangyou (county-level city), Sichuan Province. On the basis of field investigations and specimens reference,seudies were made of the seed plant floraes. The results have shown that there are 1 009 species, 519 genera and 128 families of seed plants,among them there are 19 species,12 genera and 6 families belonging to gymnosperms; and 990 species,507 genera and 122 families belonging to angiosperms. There are 39 families belonging to the pantropic category,making up 44.33%, while there are 141 genera belonging to the north temperate categpru,making up 29.81%. The flora of Guanwu Mountain Provincial Nature Reserve is characterized by the transition category from tropical to north temperate zones.