In order to understand the rule of sand-layered soil water infiltration under the film hole irrigation, the sand-layered soil water infiltration mathematical model based on Richard equation was established according to the theory of unsaturated soil water dynamics, and the SWMS-2D software was used to solve the model. The Mean Absolute Error (MAE), Root mean Square Error (RMSE), Percent Bias (PBIAS) and Nash-Sutcliffe Efficiency (NSE) were used to evaluate the simulation data and measured data of cumulative infiltration, soil wetting front and soil moisture content. The results show that MAE and RMSE is close to 0, PBIAS is less than 10% (-6.36% ~ -0.81%), and NSE are close to 1 (＞0.97), which indicate that the measured data was consistent with the simulation values.The model can accurately reflect sand-layered soil water infiltration under film hole irrigation, and SWMS-2D can be used as a research tool to simulate and analyze the infiltration characteristics of sand-layered soil water movement under the condition of film hole irrigation.