The engineering of dam on slope land is one of the gully control measures to manage the slope land.From the top to the bottom edge on slope land, it is terraced land alternating with slope land. The terraced land stores runoff water from slope land. Trees and grass could be planted on the slope for soil erosion controlling. The dam shaped ridge is const ructed on the out side edge of terraced land for water cont rolling and dry wells constructed on the inside edge for water storage. The terraced land can be irrigated using the stored water. This kind of engineering model could be widely used in mountainous areas, especially in the loess plateau region. It is an effective model for soil conservation and ecological agriculture development.