Abstrcat We collected soil samples from an area of 250 m×100 m and detemined location of sample and slope using Geostationary Technology Satellite Auto focus

the content of SOC were analyzed by method of K2CrO7-H2SO4 capacity. The data were analyzed based on Geostatistics method (Semivariance and Kriging interpolation) and the conclusion showed that SOC of sloping field had strong spatial heterogeneity at different aspect. There were an obvious spatial correlation among SOC of different soil layers

and the correlation weaken with soil depth increase. The reason may be soil-forming factors especially landform play a crucial role; soil management such as fertilization

ridge vertical to contour line and cultivation decreased this correlation and increased its randomicity

which made SOC tend to uniformity. The content of SOC had a strong relationship with landscape units and soil forming process especially soil redistribution based on distribution maps of SOC produced by Kriging interpolation. The content of SOC at shoulder-slope was lowest because of serious erosion; summit and back-slope had similar content of SOC due to similar slope. The mechanism of SOC change at the whole study area was put forward

namely SOC with high content was changing into SOC of middle and low content.