Abstract: Based on the land use data of 4 terms of 2000, 2005, 2010 and 2015 interpreted by remote sensing in Tianjin City, the matrix method and graphic method were used to analyze the wetland type and area change, the cluster analysis method was used to analyze the wetland patch reduction status from the micro scale, furthermore, the buffer analysis method was used to study the impact of ecological land on the service of human settlements and bird habitat. The results showed that in terms of landscape evolution, the wetland area in Tianjin City decreased by 260.92 km² from 2000 to 2015, accounting for 11.73% of the total wetland area, of which the deceleration was the fastest from 2005 to 2010. Wetland landscape in Tianjin City tended to be scattered and fragmented, and the number and area of wetland patches of different sizes and grades decreased, among which the phenomenon of complete loss of small and medium-sized wetlands less than or equal to 0.50 km²was the most prominent. In terms of ecological impact, the radiation rate of ecological land increased from 47.26% to 51.96% in 2000-2015, and the proportion of covered construction land increased from 64.29% to 70.31%, indicating that the ecological land effect of buffer zone was enhanced. In addition, the potential suitable habitat for birds decreased from 1 968.74 km² to 1 400.71 km² in 2000-2015, accounting for 17.12% of the ecological land decreased.