Based on the simulated rainfall test, the mechanism of slope effect of soil erosion was discussed. The influence of slope in typical areas of the Loess Plateau on runoff depth and erosion modulus was analyzed by multiple linear regression with control covariates. The results showed that: (1) The slope effect of soil erosion was closely related to soil texture and slope erosion mode. On the sandy loam slope, soil infiltration and runoff were affected by the slope. The minimum infiltration and maximum runoff rate appeared on the 15° slope. For sandy clay loam, the 25° and 15° slopes had higher soil infiltration and lower runoff, while the 20° and 10° slopes had lower soil infiltration and higher runoff. On the clay loam slope, the infiltration on the 20° and 25° slopes was larger and the runoff was smaller, while the infiltration on the 10° and 15° slopes was lower and the runoff was higher. For loam clay slope, soil infiltration and runoff rate were approximately the same under different slopes, and soil infiltration was almost not affected by the slope. (2)There was a good linear relationship between the slope and erosion dynamic parameters. On sandy loam slope, the critical runoff shear force and power increased with the increase of slope. On sandy clay loam slope, the maximum critical runoff shear force and power appeard at 20° slope. The critical runoff shear force and power increased with the increase of slope on the clay slope.Moreover, the critical runoff shear force and power decreased with the increase of slope from 15° to 25° on the loamy clay slope. This paper provides theoretical support for soil erosion prevention and control and regional land use management on the Loess Plateau.

the Loess Plateau; soil erosion; slope; artificial rainfall