The performance of self-regulation of soil refers to the ability of soil itself in controling and buffering to a certain extent in the courses of physical, chemical and biological pnocesses in vivo, enabling the storage and supply of soil moisture, nutrients, air and heat to better satisfy the needs of plant growth. The adaptability of soil to unfavorable environmental or obstacle factors, i.e，its resistance preformence, is the expression of soil self-regulation preformance under special conditions.