In the long-term theoretical thinking and practical exploration process, Xi Jinping put forward a series of important views on building a maritime power. Xi Jinping's important views on building a maritime power have experienced three phases: being the first to issue the call to ″go to the sea″ (1985-1999），clearly proposing the construction of a strong marine economy province (1999-2012)，and solemnly declaring the construction of a maritime power (2012-）. The development from economic construction to marine economic construction is a major expansion of the construction field from land to sea,of the construction vision from domestic to international, and of the strategic thinking from passive to active. From the construction of a marine economy to the construction of a strong province of marine economy, it is the process of expanding the construction scope from the local city to the provincial province, the construction level from the prefecture level to the provincial level, and the construction goal from a big marine economy to a strong marine economy. From the construction of a strong province of marine economy to the construction of a maritime power, it is the process of improving the development level from the provincial level to the national level. It is the process of expanding the development content from marine economy to marine ecology, marine science and technology, and maritime rights and interests. It is the process of changing the development mode from bottom-up to top-down. Xi Jinping's important views on building a maritime power mainly include the development of the marine economy, the protection of marine ecology, the innovation of marine science and technology, and the maintenance of maritime rights, etc. The main arguments for the development of the marine economy include the expansion of the ocean economy, the optimization of the marine industry structure, the strengthening of marine infrastructure, the cultivation of strategic marine emerging industries, and the advancement of the marine economic system. The arguments for the protection of marine ecology mainly include four theories: ″marine ecological life″, ″blue sea silver beach resources″, ″marine ecology for the people″, and ″co-ordinate land and sea″. The main arguments for the innovation of marine science and technology include four theories: ″marine science and technology bottleneck″, ″key science and technology innovation″, ″marine science and technology transformation″, and ″smart ocean construction″. The arguments for safeguarding maritime rights and interests mainly include enhancing marine sovereignty and security awareness, negotiating maritime disputes, improving marine rights protection capabilities, and promoting ocean-friendly cooperation among nations. Xi Jinping's important exposition on building a maritime power has three distinct features: In terms of the purpose of the construction of a maritime power, he has proposed an overall plan for the co-ordination of the country's prosperity and the people's benefit. In terms of the methodology of the construction of a maritime power, he has provided us with the co-ordination methods such as contradiction and system theory. In the governance of the construction of a maritime power, he has guided us to the co-ordination of international governance and state governance. Therefore, Xi Jinping's maritime power thought has great significance. On the one hand, his view guides the coastal provinces in China to create demonstration zones for strong marine provinces. On the other hand, it strongly promotes the construction of a maritime power and has achieved major breakthroughs. Moreover, it provides ″China Program″ and ″China Experience″ for global marine governance. Under the guidance of Xi Jinping's important view on building a maritime power, the quantity and quality of China's marine economy have risen steadily, the marine environment has begun to improve, marine technology has achieved major breakthroughs, maritime rights has been effectively maintained, and global marine governance has accelerated.