Abstract: Wetland presents one of the most important land use types, and plays an essential role in terrestrial carbon storage and sequestration. Wetland carbon sinks are closely related to environmental changes and human management methods. Enhancing the wetland carbon sink function is one of the important ways for China to achieve the “carbon peaking and carbon neutrality goals”. This paper focused on the need of improving the carbon sink function of wetland ecosystems in China and reviewed the policy and technical approaches. Based on current wetland protection and restoration policies, wetland carbon sinks could be efficiently improved by restoring degraded coastal mangroves and salt marshes, protecting peatlands, and restoring and reconstructing inland marsh wetlands. Potential technologies to enhance carbon sink and reduce greenhouse gas emissions included vegetation restoration and reconstruction, water level regulation, and substrate improvement approaches such as adding biological carbon and inoculating arbuscular mycorrhizal fungi. However, most of the current policies and technologies were learned from the experience of wetland protection and restoration but lack carbon sequestration assessment. More practice on demonstration projects and monitoring and evaluation are still needed to optimize technologies and policies to enhance the wetland carbon sink.