With the increasing scarcity of fossil energy such as petroleum and the increasingly urgent requirements for ensuring energy security and protecting the ecological environment, the development of renewable and clean energy has become a common consensus and concerted action among countries and regions in the world. The proposal of China’s marine power and the “One Belt, One Road” initiative, as well as the advantages of ocean energy itself, has made ocean energy equipment manufacturing face unprecedented development opportunities. In order to improve the capabilities of ocean energy development and utilization, it is necessary to comprehensively improve the development level of ocean energy equipment manufacturing in various regions of China to provide efficient, stable and reliable ocean energy equipment support. This paper uses the projection pursuit method and the stochastic frontier model to analyze and process the panel data of nine coastal provincial administrative regions from 2008 to 2015, and calculate the regional development efficiency of marine energy equipment manufacturing in each region, and influence the regional development efficiency The main factors are further analyzed. The research results show that there are differences in the regional development efficiency of China’s marine energy equipment manufacturing, and there is more room for improvement; the level of industrial interconnection and government financial support are the main influencing factors for the rapid development of regional marine energy equipment manufacturing.