Cheng-si-hu Farm At Huochiou County in Anhwei Province is located in a lowland with soils clayey,heavy and moist in nature.The crops (mainly wheat,barley or naked barley) in this area are injured seriomly by waterlogging due to the illdrainage of the soil in rainy season.This condition has been greatly improved by means of the wide application of the mole channel drainage.The experiment in a disastrous rainfall of approximately 100 mm per day showed that the drainage of mole channel laid in an interval of 10m,60-70cm in depth and combined with surface drainage of shallow ditches in an interval of 50-100 m could resist the concentrated rainfall of moderate intensity.