Abstract:Through sixteen years of introduction and acclimatization and two years of experiments on provenance, the results of Larix principis-rupprechtii have been obtained in the forest region on the north slope of Qilian Mountains. The growth of Larix principis-rupprechtii is 1—2 times as fast as that of Picea crassifolia Kom. During the period of its early growth. It has proved that this species suitable to the shade or half-shade slopes in the forest region of Qilian Mountains at the altitude of 2000—3000m.