[Objective] The environmental geological carrying capacity of Beichuan County, Sichuan Province is evaluated to provide scientific basis for development planning and construction.[Methods] Combined with the environmental geological characteristics and social development of Fujiang River basin. the environmental geological bearing capacity evaluation system based on geological environment, ecological environment and social environment was constructed. The weight of each evaluation index was determined by analytic hierarchy process and expert scoring method. The environmental geological bearing capacity of Beichuan County is evaluated comprehensively through GIS grid function.[Results] The present situation of Beichuan County is obtained. And four regions of high, higher, lower and low bearing capacity are divided.[Conclusion] The distribution of current environmental carrying capacity in Beichuan County is related to human engineering construction. In general, there is a trend of high degree of human aggregation and low bearing capacity.