In a typical black soil region,soil moisture content was invest igated using the Time Domain Ref lectometry in July,2004.The conclusion is that in the small drainage,soil moisture content within 10 cm of soil surface is the most variable and the least,and then increases rapidly below the surface layer.In a layer from 30 to 100 cm soilmoisture content tends to be steady.At the depth of 10 cm,the soil moisture content sort by ascending is downside part,middle part and upside part;to the 20 cm depth,the soil moisture content is consistent,but the ascendingsort is upside part,downside part and middle part between 30 cm and 100 cm.Soil moisture of the woodland on slope is far lower than the soybean land,and the impact of slope woodland seems to terminate at a depth of 1m;the woodland in gully is wider than that on slope,so the impact reaches to the depth more than 1m.Soil moisture of barley field is much lower than that of soybean field.