Artificial shrub-grass composite vegetation is the main vegetation type of restoration and reconstruction in the Loess Plateau, which plays an important role in soil and water conservation in this region.As a case study in the Anding district of Dingxiin Gansu Province, the water and soil conservation function of the artificial shrub-grassland ecosystem was quantitatively evaluated based on InVEST model,and the results would provide decision support for ecological restoration and sustainable utilization of water and soil resources in the hilly region of the Loess Plateau.The assessment results were as follows (1) the water conservation amount per unit area of artificial shrub-grassland was 369.25 m³/hm², which was 90.5% of grassland, 134% of forest and 110% of cultivated land. The total water conservation amount of Anding district was 3 970.99×10⁴m³, and artificial shrub- grassland accounted for 29.9% of the total water conservation in this area. (2) Nitrogen retention per unit area of shrub-grass land was 2.4 kg/hm², the purification rate was 72.21%, and the phosphorus retention of artificial shrub-grassland was 0.12 kg/hm², the purification rate was 71.07%. (3) The amount of soil conservation per unit area of artificial shrub-grassland was 308.76 t/hm², which were 1.88 times,1.44 times and 6.01 times higher than that of grassland, forestand cultivated land, respectively.The total soil conservation amount was 3 310.21×10⁴ t of Anding district, and artificial shrub-grassland accounted for 54.82% of the total soil conservation. The results showed that the water conservation capacity of artificial shrub-grassland was just lower than that of grassland,but higher than that of other land types,but the soil conservation capacity was the strongest in the six land types. Therefore, artificial shrub-grassland had better soil and water conservation function, which was the suitable vegetation type and land use mode in hilly region of the Loess Plateau.