Corticolous macrolichens on major forest trees in long term plots in Dongling Mountain,Beijing,were surveyed for the first time.Thirteen species of corticolous lichens occur in the survey area. Phaeophyscia hirtuosa and Xanthoria sp.are predominant species in corticolous lichens,and frequently occur on Quercus liaotungensis,Juglans mandshurica,Populus(P.simonii ect.), Salix ( S.caprea,S.viminalis,S.wallichiana),Fraxinus (F. chinensis,F.rhynchophylla),Ulmus japonica,Betula danuric...