[Objective] This study assessed of soil and water loss and evaluation of the benefits of measures caused by rainstorms. Soil erosion caused by rainstorms was analyzed, and the benefits of terrace measures were evaluated to provide an effective supplement for the dynamic monitoring of soil and water loss. [Methods] The Qingcheng County and Qiugou small watershed of the rainstorm (2022·7·15) center in Gansu Province were used as the research areas based on daily rainfall data and the results of the national dynamic monitoring of soil and water loss projects. An improved Chinese soil loss equation(CSLE) model was used to calculate the soil erosion modulus based on the rainfall erosivity of rainstorms. The relationship between rainfall erosivity of the rainstorm and annual rainfall erosivity under the condition of multiannual average rainfall was analyzed. The spatial distribution of the soil erosion intensity grades of different land-use types under rainstorm conditions was further analyzed, and the influence of terraces on regional soil erosion was discussed. [Results] The rainfall erosivity generated by this rainstorm in Qingcheng County reached 1.85 times the annual rainfall erosivity under the condition of multiyear average rainfall, and the rainfall erosivity of the rainstorm center reached 4.88 times the annual rainfall erosivity under the condition of multiyear average rainfall. The area of soil erosion above the strong level caused by rainstorms was 3.46 times, and the rainstorm center was 6.93 times that of the soil erosion above the strong level in 2021. Strong soil erosion caused by heavy rainstorms was primarily distributed in dry lands, grasslands, and shrubs. The current terrace area of Qingcheng County is 325 km². The amount of soil erosion in the county decreased by 72.87% compared to the situation without terrace measures. [Conclusion] Strengthening soil and water conservation work, such as returning farmland to forest and grassland, comprehensively improving sloped farmland, and constructing dry terraces, is an effective means of preventing and controlling soil and water loss disasters under heavy rainstorm conditions.