Abstract: Omei fir forest is a main original forest formation in the western mountain of Sichuan Basin. Being affected by the air currents of Pacific monsoon, and by the air temperature decreasing with increasing in altitude, so that the mountainous climate becomes suddenly cool and the precipitation is also abundant. Therefore this fir forest may be considered as a subalpine coniferous formation within the western-most boundry of the humid evergreen broad leaf forest region. The great majority of floristic composition belongs to Sino-Japanese subregion, and the community character differs from other fir forests in eastern part of Xizang plateau.This paper deals with the structure and component of Omei fir forest. Six major forest types of this fir are recognized and the growth analysis is compared between them. The natural processes of stand regeneration and succession vary with forest types at present. The changes in composition in times during succession are largely affected by differences in intensity of felling.In addition, it gives advices to raise the level of forest management, to adopt reasonable felling, to speed up the forest regeneration and other.