[Objective] The effects of artificial Hippophae rhamnoides forests on soil quality improvement under different ages were studied in order to provide a basis for scientific evaluating ecological construction, restoration and reconstruction of Artificial Hippophae rhamnoides forest in sandstone area.[Methods] Taking the Hippophae rhamnoides forests of different ages in typical sandstone area of Dalat Banner of Inner Mongolia as the research object, and using the gray correlation analysis, the soil physical properties(soil water content, soil bulk density, total soil porosity, specific gravity of soil, soil capillary porosity, soil non-capillary porosity, soil saturated water holding capacity and soil maximum capillary water holding capacity) of 0-40 cm soil layer of Hippophae rhamnoides forest from 1 a to 7 a on the sunny slope of the slope were measured. The soil improvement effect of Hippophae rhamnoides forests on sandstone soil under different forest ages was analyzed with surrounding barren slope as control(CK).[Results] Soil water content and total soil porosity increased with the age of Hippophae rhamnoides forests, decreased with soil depth, but soil bulk density was opposite; Hippophaer hamnoides of different forestages could enhance soil water holding capacity, and the water holding capacity of Hippophae rhamnoides of 4~7 a was greater than that of Hippophae rhamnoides of 1~3 a.[Conclusion] The construction of artificial seabuckthorn forest in sandstone area is beneficial to soil improvement. Hippophaer hamnoides of different forestages mainly affected soil improvement in layers of 0-10 cm and 10-20 cm.