An investigation was made in the timberline ecotone of Abies faxoniana to determine the quantitative characteristics of three\|dimensional canopy structure The vertical foliages of the community were composed of two layers of leaves and there was 1 4 m distance between them, where hardly observed any leaf. The leaf layers in the canopy were dominated by species such as A. faxoniana, Rhododendron faberi subsp. prattii and Sorbus rufopilosa . The canopy of the shrub species was shallower tha