在加快推进海洋强国建设步伐,实现海洋经济持续稳定发展的背景下,科学评估海洋强国战略对涉海企业全要素生产率的影响,有助于提升海洋相关产业结构的质量和效率。本文基于2007—2022年上市公司中涉海企业的数据,采用双重差分模型对海洋强国建设前后涉海企业全要素生产率水平进行量化评估,并分别从地区异质性、企业所有权异质性、企业金融负债比率异质性三个方面进行实证分析。结果发现海洋强国建设对促进我国涉海企业全要素生产率提高具有显著的正向效应。据此,为促进我国海洋产业发展,提出建议如下：（1）各地区应根据自身的地理位置、资源禀赋等条件,制定符合实际的海洋经济发展策略;（2）加强国有企业的引领与示范作用;（3）针对海洋产业的独特金融需求,创新金融服务模式。

Against the backdrop of accelerating the construction of a maritime power and achieving sustained and stable development of the marine economy, scientifically evaluating the impact of the maritime power strategy on the total factor productivity of marine related enterprises can help improve the quality and efficiency of the marine related industrial structure. Based on data from marine related enterprises in listed companies from 2007 to 2022, this article uses a difference in differences model to quantitatively evaluate the total factor productivity level of marine related enterprises before and after the construction of a maritime power, and analyzes them from three aspects: regional heterogeneity, enterprise ownership heterogeneity, and enterprise financial debt ratio heterogeneity. The results showed that the construction of a maritime power has a significant positive effect on promoting the improvement of total factor productivity of China's maritime enterprises. Based on this, in order to promote the development of China's marine industry, the following suggestions are proposed: (1) Each region should formulate practical marine economic development strategies according to its own geographical location, resource endowment, and other conditions; (2) Strengthen the leading and exemplary role of state-owned enterprises; (3) Innovate financial service models to meet the unique financial needs of the marine industry.