The change of land use alters not only hydrological cycle but also sediment yield process. The paper took the basin above Dapoling hydrological station in the upper reaches of Huaihe river as the study area. Based on data of land-use,and data of corresponding hydrology and meteorology in each 10 rainstorm in 1990s and 2000s,it modified the water-sediment model to simulate the sediment delivery process of Dapoling station with 0.5 hour as time scale and analyzed the impact of land use change on the relationship between rainfall and sediment load. Based on the parameters gotten in 1990s and 2000s,the paper simulated, sediment delivery process of 10 storms' so as to analyze the impact of land use change on sediment yield. The results indicated that the simulated results meet precision demand. The land use pattern changed the relationship between rainfall and sediment load. The change of land use from 1990s to 2000s mitigated the soil erosion of watershed, and resulted in the decrease of sediment load, peak and Erosion modulus.The results can provide the scientific reference for the water and soil conservation of Huaihe basin, rich and innovate the theory and method of water and soil loss simulation in humid and semi-humid region.