Abstract: The areal-types of seed plants in Anhui Province shows it is basically temperate in nature, the geographical elements are complex, and chiefly related with E.Asia . And the contrastive analyses of three ridges (Tiantangzhai ,Duozhijian and Tuojian) in Mt.Dabieshan from the number and composition of seed plants and the coefficienta and similarity of genera and species revealed the interrelationship between the southern slope and the northern slope. So we believe that these flora should belong to the same one, moreover, the vegetation of the whole Dabieshan should be situated in the subtropical evergreen broadleaf forest. When the demarcation line between the warm-temperate and the subtropics is drawn, Dabieshan must be considered as an integrated part. At the same time, combining the statistical results of the number and the chart of the life-forms of spermatophytes in Anhui Province including Mt.Huangshan, Banqiao, Tiantangzhai,Langyashan and Huangzangyu, where there are typical vegetation,the author suggests that one vegetation boundary between warm-temperate deciduous broad-leaved forest and evergreen and deciduous broad-leaved mixed forest lie through the river of Huaihe,and the other vegetation boundary between subtropics evergreen broad-leaved forest and warm-temperate evergreen and deciduous broad-leaved mixed forest lies through Yeji, Luan, Shucheng, Lujiang, Tongling, Xuancheng to Guangde.