There are about 182.33×104hm2coastal wetlands along northern China Sea, the types of the coastal wetlands above include estuary wetland, river delta wetland, silt—clayey coastal wetland, bay wetland, sandy coastal wetland, intertidal wetland of sedimentary island, coastal lagoon wetland, etc. The coastal wetlands of northern China Sea have degraded seriously influenced by natural influences and human influences. The main natural influences of degradation of the coastal wetlands of northern China Sea include coastal erosion, sea level rise, storm surge, climate change, runoff and sediment discharge decrease of rivers to sea, etc., while the human influences of the degradation include reclamation, construction of cities and ports, pollution, exploitation crude oil and natural gas，constructing banks at upstream of rivers to intercept sediment and runoff and so on. The degradations of coastal wetlands along northern China Sea include physical degradation, chemical degradation and biological degradation. The physical degradation concerns the decrease of natural wetland, the enlargement of artificial wetland, the landscape fragmentation of coastal wetland, etc. The chemical degradation concerns the enlargement of greenhouse gas emission, water eutrophication, red tide of subtidal wetland increase, pollution of sediment and catches, soil salinity change, etc. The biological degradation concerns the decrease of biodiversity and the net primary productivity, the decrease of fishery catches of intertidal wetland and subtidal wetland, the degraded successions of natural vegetations of wetlands.