Soil and water loss is one of serious ecological and environmental problems in Poyang Lake basin.USI,E and UIS,together with basin natural environment characteristics data,were used to determine several soil erosion sensitivity factors and its criteria grade for the evaluation of soil erosion sensitivity and reveal the spatial differentiation characteristics and soil erosion sensitivity in the basin.The causes of soil erosion were analyzed and a proposal on regulatory mechanisms was put forward.The study showed that soil erosion in the study area was mainly at medium and high sensitive levels.Spatially,extreme sensitivity areas were mainly distributed in Ningdu,H uichang,Ji'an,Taihe and Wanzai Counties,as well as Dexing and Shangrao Cities.High sensitive areas were mainly located in the two sides of the middle and up stream of the Uanjiang,Fuhe,Xinjiang,Raohe and Xiushui rivers and in the lakeshore area of Poyang Lake,as well as G250 farmlands and sparse young forest lands.Medium sensitivity areas were extensively distributed in the whole basin including different types of geomorphology and landuse(except water bodies).Low sensitivity areas were mainly distributed in the Jinggangshan City and Wan'an,Uan and Dayu Counties with the crescent shaped distribution.Non-sensitive areas were centered at Poyang Lake and spread radially including Tuolin,Jiangkou and Hongmen reservotrs areas.