The utility model relates to a terraced fields are moist irrigation system a little for hilly area, it does not have special problem of moistening irrigation system a little to hilly area terraced fields crop to have solved, include the irrigation water source collection device that connects gradually through the trunk line, fertilizer injection unit, filter equipment and moist device a little, moist device includes and passes through trapezoidal surface that the small transfer line is connected moist device and the domatic device that moistens a little with the pressure adjustment pond a little, the utility model provides a high mountain multiple spot dispersion, the burst of irrigating a difficult problem, apparent economic benefits has.