1. College of Geo- exploration Science and Technology，Jilin University，Changchun 130026，China; 2. College of Surveying and Prospecting Engineering，Jilin Jianzhu University，Changchun 130118，China; 3. Shenyang Geological Survey，Shenyang 110034，China

In order to analyze the changeble status of the wetland in western Liaohe River basin and find out the evolution rule and influenced factors of the wetland，the authors extract two phases wetland information of west- ern Liaohe River basin in man- machine interactive interpretation method in recent 10 years based on ETM data in 2000 and CBERS data in 2010，supported by the RS and GIS platforms． Then，the authors analyze the wetland pattern changes in time and spatial pattern，and study the influence factors of wetland dynamic change in this area from the aspects of terrain，climate and human activities． The result indicates that，in the ten years，while the nat- ural wetland of western Liaohe River basin reduced sharply，the constructed wetland tended to increase，and the conversion between wetland and non- wetland was clear，in which the conversion rate of paddy field was higher than others． Temperature，rainfall and population density are the main influencing factors on the wetland changes in the studied area．