Abstract: Age structure and regeneration strategy of six major species of the broadleaf koreanpine forest in Changbaishan Biosphere Reserve are discussed in detail.Two types of the regeneration strategy are identified.Pinus koraiensis,Fraxinus mandshurica and Qurcus mongolica are of discontinuous,regeneration type.Tilia amurensis,Acer mono and Ulmus propinqua are of continuous type.A tolerance scale of the major species is preliminary suggested as Q.mongolica→F.mandshurica→P.koraiensis→ U.propingua→T.amurensis→A.mono (in an increasing order of shade-to-lerance).