Based on the data of man made soil and water loss(1986～1992) in Guangdong province

the authors studied the main factors of man made soil and water loss

and its economic loss

increasing rate and harm

then put forward the countermeasures of the prevention and control.The sequence of sum total index in all items is:capital constructionmining reclaiming wasteland with steepslopebrickkilndestroying forest and vegetation.The economic loss is 31.36×104yuan/km2 (RMB)

an average increase of 414.06 km2 and 2 926×104 m3.The authors put forward that man made soil and water loss result from the irrational human actions

as long as execution of the soil and water conservation

supervision and necessary measures of rehabilitation and prevention are enforced

much man made soil and water loss would be refrained

prevented and controlled.