The Yimeng mountainous area is the most serious area suffering from soil and water loss in the Huaihe basin.The occurrence and development of soil and water loss for a long time have formed the special erosion environment.The application of computer and GIS has brought enormous efficiency in soil erosion investigation and evaluation.Referring to remote sensing images and investigated data of soil erosion

the thesis sets up a soil erosion sensitivity appraisal system based on the universal soil loss equation(USLE).The appraisal system includes rainfall erosion

terrain factor

soil erodibility and vegetation cover

and each of the factors that influence soil erosion sensitivity is calculated using the GIS method.Then the thesis appraises the soil erosion sensitivity in the Yimeng mountainous area using the spatial method

and divides it into the extremely sensitive area

the highly sensitive area

the moderately sensitive area

the mildly sensitive area and the generally sensitive area.On this basis

the spatial distribution of soil erosion sensitivity is analyzed too.