The invention discloses a method for improving plateau stony desertification. The method includes the following steps: applying a compound fertilizer to soil before direct seeding or seedling planting, wherein the amount of the compound fertilizer is 100-500 g/m2; selecting Lithocarpus hancei, Lonicera japonica and Quercus fabri to perform afforestation on a stony desertification barren mountain, wherein the planting density of the Lithocarpus hancei is 200-300 per mu, and the planting density of the Quercus fabri is 100-200 per mu; adopting a direct seeding afforestation manner when the area of soil is less than 0.1-0.2 m<2>, and adopting a seedling planting afforestation manner when the area of the soil is greater than 0.1-0.2 m<2> and the thickness of a soil layer is greater than 10 cm, wherein the Lithocarpus hancei, the Lonicera japonica and the Quercus fabri at the age of 1-1.5 years old are used to perform seedling planting afforestation. The method can effectively recover and vegetation, can reduce soil loss, relieve land deterioration, improve the survival rate of nursery stocks, can protect the nursery stocks against cold weather and freezing injury, can form a multi-tree-variety hybrid mode, can excellently improve the plateau stony desertification, and is suitable for large-scale promotion.