At present，China’s marine economy is booming，the marine economic growth rate is increasing year by year，and the marine economy has become an important driving force for national economic growth. In this paper，the northern，eastern and southern marine economic circles are selected as comparative analysis objects，and the linkage characteristics between marine development activities and regional economic development are quantitatively revealed through contribution，pull，relative growth rate，and measurement model regression，and the regression results of the three major economic circles are compared. The results show that the linkage between the marine industry and the regional economy in the eastern marine economic circle is the strongest，and the pull and indirect contribution are the highest；The marine industry in the southern marine economic circle has the strongest direct contribution to the regional economy，and has not yet formed a two-way circular promotion effect；The regional economy of the northern marine economic circle can effectively promote the development of the marine industry，but the development of the marine industry is relatively weak in promoting the regional economy. The internal factors of linkage differences between regions are mainly the allocation of marine resources and the economic development environment，the degree of coordinated development of sea and land，the matching of marine industry and regional economic correlation，and the difference in policy effects.