通过对辽宁省水土流失原因的分析，指出了水土流失对山区河流的危害，提出了加 强山区水土保持是治理山区中小河流根本有效措施的具体方案。 Based on the analysis of the causes of soil erosion in Liaoning Province, the paper points out the harm of soil and water loss to the mountainous rivers, and puts forward the concrete plan of strengthening the soil and water conservation in mountainous areas as the basic and effective measures for the management of small and medium-sized rivers in mountainous areas.