Cultivation of slope farmland influences surface runoff and sediment movement on slopes. This paper analyses the benefits to soil and water conservation of tillage measures, with reference to rainfall influences. The results show that: the benefit to water conservation of contour tillage is 70.56%~10.07%, with an average of 51.58%; the benefit to soil conservation of contour tillage is 76.60%~21.66%, with an average of 37.73%. In addition, the influence of tillage measures under different slope and rainfall intensity conditions is analyzed in order to demonstrate potential improvements on all slope farmland.