[Objective] The research studied the characteristics of soil and water loss on slopping land of abandoned dreg field of hydropower production and construction projects, which was expected to help us to harness comprehensively the loss of soil and water in loess hilly region. [Methods] The experiment was conducted in 2013 and the corresponding precipitation data were collected in the same year in Linzhao County, Dingxi City of Gansu Province. The loss characteristics of soil and water were demonstrated in runoff plots at Xiaojiahe Hydropower Station Ⅱ project with different treatments. [Results] (1) In 2013, Lintao County had a normal precipitation of 580.2 mm. (2) The product of precipitation and mean rainfall density can be well fitted with the amount of soil erosion with a coefficient greater than 0.85. (3) Different vegetation pattern could affect soil and water loss of abandoned dreg field. The mixed pattern of Pinus tabuliformis and alfalfa effectively reduced the soil erosion and runoff. (4) The initial soil moisture of topsoil had a significant impact on soil and water loss, and the initial subsoil moisture had no significant influence on them. [Conclusion] Soil loss of abandoned dreg field of hydropower production and construction projects were influenced by the product of precipitation and rainfall times, vegetation pattern and initial soil moisture status of topsoil.