[Objective] To analyze the characteristics of eco-enviroment evolution in Ningxia Hui Autonomous Region in order to provide theoretical basis for eco-environment construction.[Methods] By building the eco-environmental evaluation system based on the press-state-response model

the characteristics of the eco-environment in Ningxia Hui Autonomous Region from 1986 to 2012 were evaluated.[Results] (1) The pressure of eco-environment trended to increase in Ningxia Hui Autonomous Region during 1986 to 2012

so it should strengthen the implementation of industrial restructuring

energy conservation and emission reduction

recycling economy and other measures. (2) The ecological environment showed a trend of increased volatility

and the ecological environment improved gradually. (3) The ecological response scores of Ningxia Hui Autonomous Region tended to increase

it indicated that the investment of govern and protection level increased in eco-environment in Ningxia Hui Autonomous Region. In the implementation of the relevant eco-building measures

the pressure of human activities on the environment decreased

the quality of ecological environment improved gradually. (4) The ecological environment comprehensive score of Ningxia Hui Autonomous Region showed a fluctuated upward trend. [Conclusion] During the past 27 years

the quality of ecological environment is increasing in Ningxia Hui Autonomous Region.