Closely combined with the characteristics of marine economy and the internal requirements of high-quality development，this paper incorporates the rigid constraints of resources and the negative effects of environment into the accounting system for technological progress of marine economy，constructs EBM model and GML index model considering the undesired output，and explores the level of green technological progress of marine economy in China’s coastal regions. The study found that during the sample period，the green technological progress of China’s marine economy showed a trend of convergence both overall and regionally，and the convergence rate of coastal areas was different in different periods. The rate of green technological progress in China’s marine economy has shown a steady upward trend. Among them，during the “Eleventh Five-Year Plan” period，this indicator showed a lower value in the north and south regions and a higher value in the central region. However，after entering the “Twelfth Five-Year Plan” period，most of the regions with higher value of this indicator were concentrated in the northern coastal provinces and cities.