Abstract: Through the investigation of rainfall data and land data in the region, taking the construction project area as the research object, the RUSLE model of the area is explored, the influencing factors of soil erosion factors are analyzed in the model, the soil erosion characteristics of the whole process are sumed up before and after the construction process, and quantitative evaluation are carried out. The results show that in the expressway construction project, the RUSLE model based on the historical data shows that the erosion intensity is dominated by slight erosion and light erosion in the construction process. On the erosion area, mild erosion compared proportion increased dramatically, prior to the construction project construction cause the change of land use types directly affects the vegetation cover factor and factor of soil and water conservation measures. The predicted value of the model is roughly the same as the measured value, but for the measured data in the construction process, it is one grade higher than the predicted data.

Key words: RUSLE model, road engineering, soil erosion, temporal and spatial pattern, soil conservation