As an area with fragile ecological environment and sensitive soil erosion

the study about soil erosion on the Three Gorges Reservoir Area is of great significance to its ecological construction. In this paper

Daning River Basin and Meixi River Basin were selected as the study areas. Based on the Remote Sensing mages in the year of 1988

2000

2010 and 2015

and by using GIS and RS technique combined with field survey

the data about soil erosion were extracted and the spatial variability of soil erosion evolution in different elevations and slope belts were analyzed through the comprehensive index of soil erosion intensity and landscape pattern index. Finally

based on the natural and socio-economic analysis and the reasons of the spatial differences of the basin

this paper explores the measures for soil erosion prevention and control. The results showed that (1) the most serious soil erosion zone and its evolution trend in the two river basins were different

from the point of view in the severity of soil erosion. The most serious erosion zones of Daning River Basin were in the elevation from 1 000 m to 1 200 m and in the slope from 25° to 35°

however the most serious erosion about the Meixi River Basin occurred in the elevations from 800m to 1 000m and in the slope of 25° to 35°; (2) the evolution of soil erosion were different in the two river basins. The soil evolution of Daning River Basin in >2 000 m elevation and >35° slope were the most serious

but not obvious in <200 m and 0°～5° degrees; (3) from the soil erosion landscape pattern evolution

in 800 to 1 200 m and 25° to 35° elevation slope belt

the possibility of soil erosion intensity in Daning River Basin was greater than that in Meixi River Basin. All above research results laid the foundation of the following up researches about science problem

which not only included spatial distribution of soil erosion in the height zone of 800～1 200 m with different slope and in the slope of 25° to 35° with different elevation

but also the relationship between the main natural factors and soil erosion.