The balance between water and soil is very important for agriculture. So it is strategic significance to measure the degree of the balance between water and soil for rational and efficient development of water and cropland resource. This study develops a model of regional Gini coefficient which provides a new methodology of regional study on the balance of resources, such as water and soil. The result showed that the degree of the balance between water and soil in China is pretty much the same thing as the average in the world or in Asia.