In order to solve the problem of absent rationality and system in leveled ditch design for runoff har-vesting, the objectives, cross-section parameters, and havesting potential were studied for leveled ditch de-sign in both theory and experiments. The results show that in the growing seasons (March to September) of the 6 years from 2002 to 2008, water stored in the soil on the slope with leveled ditches was significantly higher than that on the natural slope, in the test rainfall intensity and rainfall, the intercepted runoff were 4.41, 64.23, and 104.13 mm on a 25°slope with leveled ditches, and were 5.25, 72.39 mm on a 35°slope with leveled ditches, respectively. The intercepting capacity per unit time increased with the increase of rain-fall intensity, reflecting the importance of high-intensity rainfall to surface runoff harvesting after slope transformation with leveled ditches.