[Objective] The mechanism of underlying vegetation restoration in sandy grassland when combined super absorbent polymers with lignin crust was studied, in order to provide a theoretical basis for the restoration of sandy vegetation in desert grassland.[Methods] The experiment was conducted in Urat Desert grassland in Inner Mongolia Autonomous Region. The two treatments were control and restoration measures (combined application of super absorbent polymers and lignin crust). The above-ground biomass, coverage, soil moisture content, proportion of soil aggregates, soil infiltration rate, stable infiltration rate, alkali-hydrolyzable nitrogen, available phosphorus and available potassium content were assessed.[Results] ① Restoration measure significantly increased the aboveground biomass and coverage of plants. ② Restoration measure increased the proportion of water-stable macroaggregates, soil infiltration rate, stable infiltration rate, and soil moisture content, but reduced the proportion of microaggregates. ③ Restoration measure significantly increased the soil alkali-hydrolyzable nitrogen, available phosphorus and available potassium contents.[Conclusion] The restoration measure can increase soil moisture and nutrient contents, improve plant productivity and promote the vegetation restoration in the sandy grassland.