[Objective]In order to more accurately grasp the variation of soil moisture in fixed dunes in sandy land in the East of Yellow River in Ningxia, [Methods] this study used the Hydrus-1D model to simulate the vertical distribution and time variation characteristics of soil moisture in 0-150 cm soil profile, and evaluated the applicability of Hydrus-1D model in sandy land in the East of Yellow River in Ningxia. [Results] ① When the rainfall is less than 2.2 mm, the infiltration depth is less than 5 cm. When the rainfall is between 3.6 mm and 8.2 mm, the infiltration depth is between 5 cm and 15 cm. When the rainfall is between 10.8 mm and 22.8 mm, the infiltration depth is between 15 cm and 30 cm. ②Using Hydrus-1D model to simulate the soil moisture content of different depths in Hedysarum scoparium forest land, the overall simulation effect is better. The determination coefficients of the simulation stage and the verification stage are 0.756 and 0.773, respectively. The root mean square errors are 0.071 % and 0.064 %, and the relative errors are 0.030 % and 0.32 %, respectively. The fitting effect of soil water content in surface 5cm and deep 125cm was not high, and the simulation effect of soil water content in other soil layers was better. The determination coefficient of soil layer was 0.571 ~ 0.849, and the root mean square error was 0.0001 % ~ 0.042 %. The infiltration effects under different rainfall events are different. [Conclusion]In general, the depth of rainfall infiltration increases with the increase of rainfall. The soil water content simulated by Hydrus-1D model is in good agreement with the measured value, and it is proved that the model is suitable for simulating the water content of soil profile in sandy land in the East of Yellow River in Ningxia.