Abstract: Compared with non-karst area, the soil and water loss in karst area has its specificity, that issoil and water loss occurred at the same time in surface and underground leakage. Especially, theunderground leakage is not well known by people. In this paper, we analyze the causes of rockydesertification from natural and human factors. Then, we give detailed analysis on the hazard and theactive mechanism of the soil and water underground leakage in Karst rocky desertification. Finally, bysummarizing the research methods of soil underground leakage, we propose the prevention and controlmeasures of underground soil and water leakage in Karst rocky desertification. The purpose of this paperis to provide basis and reference for the control of underground soil and water leakage in Karst rockydesertification.