目的分析镇巴县坡改梯的经济、社会和生态效益,为水源区坡耕地治理提供科学依据。方法以镇巴县项目区调查数据为基础,进行理论分析。结果镇巴县通过大力开展坡改梯建设,取得了显著的经济效益和水土保持效益。不仅有效地减少了水土流失和对水源的污染,也为镇巴县农民脱贫做出了贡献。结论坡改梯是水源区水土保持治理的重要工程措施,是治理坡耕地的重要手段。 Objective To analyze the economic, social and ecological benefits of slope alteration in Zhenba County, and provide a scientific basis for slope farmland improvement in water source area. Method Based on the survey data of the project area in Zhenba County, a theoretical analysis was made. Results Zhenba County through the vigorous development of slope to ladder construction, and achieved significant economic benefits and soil and water conservation benefits. It not only effectively reduces soil erosion and water pollution, but also makes contributions to the elimination of peasants in Zhenba County. Conclusion It is an important engineering measure to control water and soil conservation in water source area and it is an important measure to control sloping arable land.