Soil samples at different depths were collected from island forest,Calamagrostis angusti f olia meadow and Carex Lasiocarpa marsh in a typical annular wetland of the Sanjiang Plain.Horizontal and vertical distributions and DOC(dissolved organic carbon) storage in the wetland were studied and the DOC distribution affected by the specific hydrology and landform conditions of typical annular wetland was analyzed.Results showed that the DOC content decreased with the increased soil depth.From high to low,the DOC contents in soil profiles showed the order of Carex Lasiocarpa marsh,Calamagrostis angustifolia meadow and island forest,and the DOC storage,Calamagrostis angustifolia meadow,island forest and Carex Lasiocarpa marsh.respondingly.In the 0-60 cm soil layers,the DOC storages were 0.1113,0.0844 and 0.0588 t/hm²,correspundingly.