Northern grassland is the main part of natural grassland in China. Its multiple ecological functions play extremely important role in promoting ecosystem stability and ensuring ecological security in northern China. In this study, based on the grassland ecological function area, we used the revised wind erosion equation (RWEQ), revised universal soil loss equation (RUSLE), and water balance method to evaluate the soil conservation function, sand fixation function, and water conservation function in different grassland ecological function areas of northern China during 2011-2015. The results will provide the assessment data for studying grassland ecological function area, and provide the scientific policies for grassland ecosystem protection and restoration. The results showed that:(1) the values of sand fixation capacity and sand fixation amount in northern grassland ecosystem, were 32.44 t hm^-2 a^-1 and 8.922 billion t/a, respectively. The highest values, both observed in semi-arid grassland areas, were 68.76 t hm^-2 a^-1 and 2.916 billion t/a, respectively. The total sand fixation amount in this area contributed 32.68% of the northern China. (2) The values of soil conservation capacity and soil conservation amount in northern grassland ecosystem, were 124.5 t hm^-2 a^-1 and 24.359 billion t/a, respectively. Soil conservation function presented a great spatial heterogeneity in northern grassland ecosystem. The highest value of soil conservation capacity was 431.52 t hm^-2 a^-1, that was observed in warm shrub-grassland area. Moreover, the highest value of soil conservation amount was 10.536 billion t/a, that was observed in alpine meadow area. The total soil conservation amount in this area contributed 43.19% of the northern China. (3) The values of water conservation capacity and water conservation amount in northern grassland ecosystem, were 93.03 m³ hm^-2 a^-1 and 28.898 billion m³/a, respectively. Compare to other areas, the areas of alpine meadow and alpine grassland had higher water conservation capacity, with values of 211.09 m³ hm^-2 a^-1 and 118.04 m³ hm^-2 a^-1, respectively. Simultaneously, the areas of alpine meadow and alpine grassland had greater water conservation amount than other areas, with values of 12.536 billion m³/a and 7.213 billion m³/a, respectively, and accounting for 68.34% of the total water conservation amount in northern China. Overall, compare to other areas, the areas of semi-arid grassland, warm shrub-grassland, alpine meadow, and alpine grassland in northern China, which play extremely important role in exerting the multiple ecological functions of soil conservation, sand fixation, and water conservation, and improving the services and stability of northern grassland ecosystem.