Yanqing County is located in the northwest of Beijing, as this area is rich in ecological resources, it plays an important role in water source protection and sand control for Beijing and adjacent areas. Therefore, the protecting of the ecological environment of the area is extremely important. In this paper, based on the ecological characteristics of Yanqing, we select topography, ecological security, and social economy as ecological environmental impact factors under the support of GIS technology. Finally, according to the level of ecological sensitivity determined by each factor, Yanqing County was divided into highly sensitive areas, moderately sensitive areas and ecologically weak sensitive areas, accounting for 48.4%, 18.31% and 33.29% of the total area of Yanqing, respectively. At... the same time, the results of ecological sensitivity analysis were discussed, and suggestions for zonal protection and construction were put forward, which provided valuable reference for ecological environment protection and economic development of Yanqing area.