Abstract: Coastal wetland is a vulnerable and sensitive ecosystem. Based on the data from the monitoring and investigation in recent years in the area, this article described the four functions of a healthy coastal wetland, summarized the scientific attribution of the measured indicators, and assessed the healthy status of coastal wetlands in Tianjin. Our results suggest that the ecosystem of Tianjin coastal wetland is in a "sub-health" status, and the negative pressure faced by the city will be further intensified in the future. The change in wetland ecosystem is detectable if effective indicators are selected and monitored. The work of this kind will be very important for the management and conservation of the wetland in the area.