Integration of industry and city and economic development based on environmental sustainable development

With the further development of industrialisation and urbanisation, urban environmental problems have become increasingly prominent. How to achieve the integration and integrated development of urban environment and economy on the basis of maintaining sustainable development has become an urgent problem to be solved. This paper takes Jiangxi Province as an example, and uses the grey relational analysis method to explore the problems existing in the development of Jiangxi Province's product-oriented cities. The research results show that from 2011 to 2019, the degree of industrial integration in Jiangxi Province increased from 0.312 to 0.770, showing a clear growth trend. This article concludes that the sustainable development of the environment is negatively related to industry, and only by integrating industrial integration and promoting the upgrading of industrial structure can the integrated development of cities be realised.