Abstract: Shajiang soil is one of the soils that have low yield in Huanghuaihai Plain. The two thirds of the Shajiang soil of the plain locate in Huaibei plain. This kind of soil has a low ability of accommodating water automatically. It is prone to drought, water logging and these calamities often arise alternatively. This kind of soil hinders the development of the agriculture largely and makes a great difficulty for the prevention and cure of the nature disaster. In order to excavate the production potential of this region and make a great development of the agriculture, this paper discusses the form and the progress of the Shajiang soil and the characteristic of the soil structure. After analyzing the environment of the region, this paper discourses upon the function mechanism between the drought and water logging calamity and the soil structure of the Shajiang soil in Huaihe River valley. At the end of the paper the authors suggest some reasonable measures for the reclamation of the low-and-media-low yielding land and the elimination of the calamity.

Key words: Drought and water logging calamity, Huaibei plain, Shajiang Soil