[Objective] With the using of CSLE model, we calculated the soil loss in two situations under certain conditions of rainfall, soil and vegetation: taking terraces as a terrain factor or as an engineering measure factor. It was expected to provide a new idea for quantitative evaluation of soil erosion. [Methods] This thesis choose Zhifanggou watershed and Yangou watershed of Loess Plateau as experimental sample plots and used DEMs of the study regions with a resolution of 5 meters, images of WorldView 3 with a resolution of 0.3 meters and Landsat 8 with a resolution of 30 meters, precipitation data, soil data and land use data, etc. [Results] (1) In Zhifanggou watershed and Yangou watersheds, as a terrain factor, the calculated average soil loss of watershed in slope terraces are both greater than the ones taking terraces as an engineering measure factor. However, the comparison results between the average soil loss of watershed in level terraces and taking terraces as an engineering measure factor varied in different watersheds. (2) As the increase of the proportion of terraces, the average soil loss of watershed taking terraces as an engineering measure is much lower than the one taking terraces as a terrain factor. [Conclusion] Taking terraces as terrain factor or engineering measure factor can change the calculation of soil loss, especially when the proportion of terraces is larger.