The development of marine economy is the key content to realize the strategic goal of marine power, which provides basic impetus for the construction of marine power. In this paper, the time-varying stochastic frontier gravity model and trade index analysis method are used to calculate the export trade expansion space (TS) and the import dependence of marine high-tech products (IRCA), and the Boston matrix analysis method is used to study the export trade prospect of China ' s marine high-tech industry in RCEP. The research results showed that China and RCEP member countries have a bright future in the trade of marine high-tech products, and there is a large space for trade expansion, but there are great differences in the specific conditions of different marine high-tech product segments. In addition, the results of stochastic frontier gravity model showed that China's economic scale and the economic scale of other members of the RCEP free trade zone have a positive role in promoting China's export trade of marine high-tech products overall. The formal entry into force of RCEP will bring strategic opportunities for China's marine high-tech products trade. China should take corresponding measures to enhance the competitiveness of domestic marine products industry and enterprises, expand China's marine industry, especially marine high-tech industry trade and actively seek the road of China's marine economic power.