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The coupling degree model and the coupling coordination degree model are used to measure the degree of coupling and coordination between the two, and the coefficient of variation method is used to analyze regional differences. Through the investigation, the author found that the coupling degree between Hebei Province and Liaoning Province is low, the fluctuation is large, and the regional difference is obvious. The coefficient of variation of the degree of coupling between regions is calculated, the coefficient of variation is gradually reduced, and the difference between regions is significantly reduced. The carrying capacity of marine resources and environment is positively correlated with the potential of marine economic development. The entropy method is used to measure the environmental carrying capacity of marine resources and the potential for economic development in the Bohai Sea. The results show that the coupling degree between marine economic development potential and marine resource environmental carrying capacity in the Bohai Rim region is generally higher than 0.8 and less than 0.8. This space shows the stable coupling and coordination of the coupling degree and coupling coordination degree between Tianjin and Shandong Province.