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The evaluation of health level of land-use ecosystem provides important support for the regional health and social-economic sustainable development. To measure and study the granularity characteristics and spatial differentiation law of ecological health level of land-use in Yibin City, based on PSR model, taking kilometre grid as an evaluation unit, spatial exploration method was used to reveal its spatial differentiation law, and the decisive force of each factor was visualized through the factor detector. The results show that: (1) The health level of the land-use ecosystem in Yibin City is generally good, and the regional development is relatively balanced, but there are significant differences between the municipal districts and suburban counties. The average index of comprehensive health level of landuse ecosystem fluctuates around 0.60, the land for health level accounts for 46.07% of the total area, the land for sub-health level accounts for 29.78%, the land for unhealthy level accounts for 24.15%. (2) The health level of land-use ecosystem had a strong spatial correlation, which was mainly positive, and there was a significant spatial agglomeration pattern, dominated by HH type or LL type clusters. (3) The difference of human activities was the main factor that affects the spatial differentiation of ecological health level of land-use in the whole city, followed by the difference of natural system resilience, and the other factors were soil properties, landform and policy regulation. Finally, it was concluded that tightening the upper limit of capacity, holding the ecological bottom line, insisting on the intensive utilization of land, optimizing the spatial layout of “production, life and ecology”, adjusting the industrial structure, and developing ecotourism will become the necessary measures for Yibin city to improve the ecological health level of land-use and build a famous ecological city of landscape culture.

Evaluation of Health Level of Land-use Ecosystem Based on GIS Grid Model