因其特殊的地形地貌及水文气象特征,近年来云南山区小流域沟道水土流失及滑坡、泥石流等自然灾害逐年加剧,损失了珍贵的土地资源,直接影响到社会经济的可持续发展。为保护山区小流域河流入江口和进入平坝地带的优良土地,云南在部分沟道兴建了一些坝系,取得了较为明显的成效。介绍了云南山区小流域沟道坝系建设的规划步骤、作用成效,提出了坝系发展的建议。 Due to its special topography and hydro-meteorological features, soil erosion, landslides and mud-rock flow in the small watersheds in mountain areas of Yunnan Province have been aggravating year by year, losing precious land resources and directly affecting the sustainable socio-economic development. In order to protect the small river basins in mountainous areas and the excellent land into the Pingba area, some dams have been built in part of the channel in Yunnan Province, and obvious achievements have been achieved. This paper introduces the planning steps, the effect and the construction of ditch dam system in the small watershed of mountainous area in Yunnan Province and puts forward suggestions on the development of dam system.