The ocean plays a crucial role in the economic and social development of the Pearl River Delta region，representing a key strategic area for high-quality growth. The Guangdong-Hong Kong-Macao Greater Bay Area，is distinguished by its unique political landscape，strong marine industry foundation，well-developed infrastructure，and advanced international scientific and technological support. This report systematically discusses the development history and current status of the marine economy in the Greater Pearl River Delta region from the perspectives of the political，economic，social，and technological environments，highlighting the advantages and characteristics of different areas. SWOT analysis of Guangdong’s marine economy reveals its strengths in terms of location，industry，and innovation. However，it also identifies weaknesses such as environmental constraints，insufficient collaboration，and low levels of technological transformation. The report suggests that Guangdong should capitalize on strategic policies，enhance scientific and technological innovation，and deepen cooperation to seize emerging opportunities，while addressing challenges such as the demand for sustainable development，the need to optimize industrial structure，and the necessity of improving cooperation mechanisms. The analysis concludes with the development trend of the marine economy in the Pearl River Delta，emphasizing high-quality development，deeper regional integration，digital and intelligent transformation，and continuous policy optimization. It concludes with policy recommendations aimed at building a modern marine industry system，enhancing marine science and technology innovation，and strengthening both internal and external collaborations to achieve high-quality development in the Pearl River Delta’s marine economy.