Abstract:The land degradation in Chuxiong city is resulted mainly by water erosion , it is representative of Yunnan-Guizhou plateau .The area of degraded land is 1159.44 km2,it makes up 26.17% of the total area.The harm of land degradation are reducing soil fertility,bursting bridges,aggravating natural disaster and damaging irrigation works.In its formation causes, tattered landform,uneven precipitation and loose land surface matter are the natural factors ;The increased population resulted in slope land under cultivation,forest cut and over-load grazed.