Test and analysis of the grey drab earths in the Qilian Mountains under Qinghai spruce stands different in age showed an order of grown-up forest > young forest > grassy and shrubby slope in soil porocity, granule structure, physical clay, moisture, permeation rate, permeation coefficient, organic matter, total N, readily available N, readily available P, readily available K, and CEC, and an order of grassy and shrubby slope > young forest > grown-up forest in soil bulk density, physical sands, pH, CaCO₃^-, and total salt. With the age of the stand, leaching of calcium carbonate and soluble salts was intensified to a varying degree. The differences between treatments were significant and extremely significant by LSR.