近年来随着经济建设的迅速发展 ,人类活动破坏了林草植被 ,造成水土流失 ,加之暴雨洪水因素 ,引发汛期超标准洪水出岸 ,泛滥成灾。以商都县西山流域为例 ,从水土保持综合治理、改善生态环境、减轻城镇洪灾这个角度出发 ,初略分析了加强城镇上游小流域治理 ,恢复自然植被 ,削减洪峰的重要作用 In recent years, with the rapid development of economic construction, human activities have destroyed the vegetation of forests and grasses, resulting in soil and water loss, combined with storm floods and floods, triggering excessive floods in flood season and devastating floods. Taking Xishan Valley of Shang County as an example, from the perspective of comprehensive management of soil and water conservation, improvement of ecological environment and reduction of urban floods, the paper analyzes the important role of strengthening management of small watersheds in the upper reaches of urban areas, restoring natural vegetation and reducing flood peaks