Abstract: Due to lack of water and fertilizer in sandy land, the grass survival rate is low and the growth is slow. In this paper, the effect of super absorbent bamboo fiber combined with Bacillus subtilis on vegetation restoration of sandy land was explored. The results were as follows: (1) Compared with the control group, the average monthly soil humidity in the experimental group was 38.06% higher, and the average monthly soil temperature was 2.89% lower. The number of bacteria and fungi in the 0-10cm soil layer was 126.69% and 50.25% higher than that in the control group; (2) The total nitrogen, total phosphorus, total potassium and yield of forage in the experimental group increased by 114.49%, 35.74%, 44.47% and 52.63% compared with the control group. The soil ammonium nitrogen, available phosphorus, available potassium and organic matter in the experimental group were higher than those in the control group, but not significantly; (3) The survival rate of Elymus dahuricus in the experimental group was significantly higher than that in the control group, and the number of plants per unit area was 345.04% higher than that in the control group. The results showed that the super absorbent bamboo fiber combined with Bacillus subtilis could effectively improve the soil moisture and nutrient content in sandy land, and improve the plant survival rate in sandy land.