Abstract: Exploring the change of ecological service value and its coupling with the economic development is important for realizing sustainable development of regional ecology and economy. Human activities are intense in Guanzhong region, with the sustainable development of ecology and economy being one of the hot issues. Here, we estimated the ecological service value in Guanzhong region during 2000 to 2018 based on the improved equivalence factors, and established an index system based on the entropy method to explore the characteristics of regional economic level. The coupling coordination degree model was established to analyze the relationship between the ecology and economy. The results showed that the value of ecological service showed a clear upward trend. The ecological service value of forest land accounted for the largest proportion among the land use types, with the fastest growth rate. The level of economic development was improved significantly. Spatially, there was a dual-center differentiation feature with Xi’an City as the center and Xianyang City as the sub-center. The coordination degree of ecological and economic development tended to be better as a whole, with most counties and districts changing from basic uncoordinated to low-coordinated state, but there was still a gap with the good coordination state.

Key words: ecological service value, coupling coordinate, entropy method, regional economy, Guanzhong region.