Abstract: Larix potaninii Batalin is the conmon larch of the sub-alpine zone in wes tern Sichuan and south Gansu Provinces，colloquially it is known as the“red 1arch”(hong sha)．Being deciduous this larch is better adapted to cold and dry climates than spruces alld firs．As the altitute increases the larch forests become more and more abundant until finally in the upper edge of forest zone．Being highly intolerant，this larch Can not compete successfully with spruces，firs，and other trees under．Moisture condition within the forest．Zone．So that the forestry nature of larch forest is quite different from that of other conifers．This paper deals with red larch forest which contains five sections，namely：1．The. Distribution and habit；2．The Strueture，growth and productivity of stand；3．The forest types；4．The dynamics of succession；5．The forest management．