研究西安市经济与生态环境耦合协调演变趋势，为提高西安市经济与环境系统的

To study the trend of the coordinated and coordinated evolution of the economic and ecological environment in Xi'an, and to provide suggestions for improving the coupling between Xi'an's economy and the environmental system. Select the statistical yearbook data of Xi'an Statistical Bureau from 2009 to 2018, and use entropy weighting method, comprehensive evaluation index, coupling degree model and coupling coordination model to study the development level, coupling degree and coupling coordination degree of Xi'an economic and environmental system law. The results show that the comprehensive economic evaluation index of Xi'an shows a continuous upward trend; the comprehensive evaluation index of ecological environment is on the rise, and has declined in 2010 and 2017; the comprehensive economic evaluation index is higher than the comprehensive environmental evaluation index; the coupling degree of the economy and the environment in Xi'an Between 0.69 and 1.00, the overall quality coordination interval; the coupling coordination degree increased from 0.39 to 0.9, the overall completion of the transition from good coordination to high quality coordination. According to the results, the improvement of the ecological index should start with the discharge of industrial waste water, the amount of industrial wastewater treatment, the amount of urban sewage treatment, and the area of ​​the park; to maintain stable economic growth, we should start with the total value of imports and exports, the proportion of tertiary industry, and the proportion of secondary industry.

This paper studies the trend of the coordinated evolution of economic and ecological environment coupling in Xi'an, and provides opinions to improve the coupling of the economic and environmental system in Xi'an. Selecting the statistical yearbook data of Xi'an Bureau of Statistics from 2009 to 2018, the change of the development level, coupling degree and coupling coordination of Xi'an economic and environmental system was studied by using the entropy empowerment method, comprehensive evaluation index, coupling degree model and coupling coordination model. The results show that the economic comprehensive evaluation index of Xi'an city is on the rise, the ecological environment comprehensive evaluation index is on the rise, and decreased in 2010 and 2017, the comprehensive economic evaluation index is higher than the comprehensive environmental evaluation index, the economic and environmental coupling degree of Xi'an City is between 0.69-1.00, the overall in the high-quality coordination range, the coupling coordination from 0.39 to 0.9, the overall completion of the transition from good coordination to high-quality coordination. According to the results, the improvement of ecological index should start with industrial wastewater emissions, industrial wastewater treatment, urban sewage treatment and park area, and to maintain stable economic growth should start with the total value of imports and exports, the proportion of tertiary industry and the proportion of secondary industries.

This paper studies the harmonious evolution trend of the coupling of Xi'an economy and ecological environment, and provides suggestions for improving the coupling of Xi'an economy and environmental system. Select the statistical yearbook data of Xi'an Municipal Bureau of statistics from 2009 to 2018, and use entropy weighting method, comprehensive evaluation index, coupling degree model and coupling coordination model to study the development level, coupling degree and coupling coordination degree of Xi'an's economic and environmental system. The results show that the comprehensive economic evaluation index of Xi'an city is on the rise; the overall ecological environment evaluation index is on the rise, and it has declined in 2010 and 2017; the comprehensive economic evaluation index is higher than the comprehensive environmental evaluation index; the coupling degree of Xi'an city's economy and environment is between 0.69-1.00, which is in the overall high-quality coordination range; the coupling coordination degree is increased from 0.39 to 0.9, which is completed as a whole The transition from good coordination to high-quality coordination was achieved. According to the results, to improve the ecological index, we should start with industrial wastewater discharge, industrial wastewater treatment, urban wastewater treatment and park area; to maintain stable economic growth, we should start with the total value of import and export, the proportion of the tertiary industry and the proportion of the secondary industry.<br>