Abstract: The flora of seed plants from Changbai Mountain is one part of northeast China, and has its greater part of genus and species. It has about 109 families, 496 genus and 1274 species, and it is the most aboundant alpine type flora in northeast China. The flora is temperate in nature and remarkable in endemicity. It is obvious in horizontal and vertical vicariance, has the wide collection in geographical relationships. It is closely related with rest E. Asia (especially with Japan). The flora is complex in geographical elements of species, having 17 types and 17 subtypes. The flora is composed of temperate elements, frigid and subfrigid elements, and tropical elements. The principal part is the E. Asia region element which is more than half in composion. North Temperate region elements and other temperate elements has also relative amounts. The flora origin is not after the Tertiary Period.

Key words: Changbai Mountain, Seed plant, Flora