The fragile environment of gobi desert was destroyed because of mining work.The modulus of gangue and dregs was 160000t/(km²#a).It is increased more about 800 times than the original surface.The work of soil and water conservation was very difficult after the fragile environment was destroyed.To protect the existing vegetation and the earth's surface is the best prevention and cure measures.The dregs must covered after the gangue storeroom was stop being used.