ecological environment;  evaluation;  multi-level correlation evaluation method;  Arid zone

Realizing the optimal regulation and scientific management of the ecological environment is an important measure to protect the ecological environment, promote the coordinated development of social economy and environment, and establish a harmonious relationship between man and the environment. According to the characteristics of the ecological environment in the western arid area, from the perspective of facilitating the regulation and management of the ecological environment, the quantitative index system and evaluation standards of ecological environment quality are given, and the multi-level correlation evaluation method of ecological environment quality assessment and its application examples in ecological environment quality assessment in Ningxia sub-region are introduced.