Guoluo Tibetan Autonomous Prefecture,located in the Yellow River Headwaters region,is one of prefectures with the highest altitude,the worst climate,the most difficult environment,the least socio-economic development and the highest proportion of mono-ethnic composition in China.The ecological environment is very sensitive and fragile and the ecological problems become increasingly serious,which have posed a bad impact on the local socio-economic development and the ecological environment,as well as people's property safety of the middle and lower reaches of Yellow River.Based on the data of 2006 Landsat7 ETM image,by use of RS and GIS,the landscape pattern of Guoluo Tibetan Autonomous Prefecture was analyzed.The corridor effect of the Yellow River was obvious when in 10 kilometers and had a scale restriction.Finally,the ecological functions of county zone were concluded according to ecological suitability.And also some management measures about the ecological planning were suggested.This study provided a strong theoretical and technical basis for the region's ecological protection policy formulation and scientific environmental management.