该书主要内容包括构建人海和谐的海洋生态环境，统筹推进海洋生态环境保护，系统治理海洋生态环境，科学开展海洋生态保护与修复，加强海洋生态环境监督管理，提升海洋绿色低碳发展水平，全方位开展海洋生态环境保护国际合作等。

Preface
Ⅰ.Improving Marine Eco-Environment for Harmonious CoexistenceBetween Humans and the Ocean
Ⅱ.Coordinating Marine Eco-Environmental Protection
Ⅲ.Systematic Governance of the Marine Eco-Environment
Ⅳ.Science-Based Conservation and Restoration of Marine Ecosystems
Ⅴ.Strengthening Supervision and Administration of the Marine Eco-Environment
Ⅵ.Advancing China's Green and Low-Carbon Maritime Development
Ⅶ.Carrying Out All-Round International Cooperation on Marine Eco-Environmental Protection
Conclusion