[Objective] The remote sensing monitoring research of vegetation cover and engineering factor(CP) in the important engineering projects of Yangtze River Committee on Xihe catchment of the Danjiang basin was conducted to provide scientific basis of comprehensive control and evaluation based on quantitative monitoring of water loss and soil erosion in the Danjiang River basin and the upper reaches of the Yangtze River. [Methods] HJ-A-B satellite image data in 2010 of Xihe catchment

Shangnan County in Danjiang basin were collected and analyzed with Erdas software to get the coverage of different vegetation types. Vegetation factors calculation method that was put forward by Bu Zhaohong

termed as remote sensing monitoring models(QRSM) for soil erosion quantitative was used to get the formula relationship between vegetation factors and vegetation coverage. and to study the vegetation cover factor of Xihe catchment by remote sensing monitoring. [Results] The vegetation cover and engineering measures factor value in the harnessed north area and the southern mountain of Xihe catchment are quite low. Higher values of them can be found sparsely distributed in rive sides. It is mainly because of house and road constructions taking over vegetation. A consecutive higher vegetation cover factor was found in the middle of the Xihe catchment

where though the population is concentrited

the measurement factor is lower. [Conclusion] There are many natural factors affecting soil and water loss

among which the vegetation cover is the greatest one. Human activities should not be neglected

the over-exploitation and utilization of land resources can also change terrestrial ecosystem. Therefore

study of soil and water loss should take into account the geographical

natural and economic development. According to local condition

reasonable planning should be carried out to ensure sustained and stable economic development and ecological security.