Abstract: This study used the three-stage DEA method to measure the marine economy green development efficiency in 11 coastal areas of China. In the second stage, the influence of environmental factors and random factors were eliminated., and the marine economy green development efficiency of 11 coastal areas in China were analyzed and calculated under relatively fair conditions. The results showed, ①the efficiency value obtained after the introduction of SFA to eliminate environmental variables was more in line with the actual situation; ②the current China’s marine economy green development efficiency was relatively low, and the contradiction between marine economy development and resources and environmental protection was more prominent; ③the marine economy green development efficiency value in Tianjin, Shanghai, Shandong, Guangdong were relatively high, the marine economy green development efficiency value in Liaoning, Jiangsu, Zhejiang, Fujian were at the medium level, and the marine economy green development efficiency value in Hebei, Guangxi, Hainan were relatively low; ④the increase of the area of sea area use rights and the number of employment personnel involved in the sea will lead to the decline of production rate, and the increase of marine environmental protection zones was beneficial to the marine economy green development efficiency. Strengthening the effective management of the area of the right to use the sea area, actively adjusting and optimizing the talent structure, and appropriately increasing the number of marine environmental protection zones, may be effective ways to promote the green development of marine economy.

Key words: marine economy green development, green development efficiency, environmental factors, three-stage DEA, SFA