Abstract: With development of the constructed wetland technology and extending of eco-city  concept，it is popular of the  sustainable evaluation and land reclamation of subsidence area in mining field.In view of the need of sustainable evaluation and land reclamation in mining subsidence area，this paper discusses mainly introduces the general structure of constructed wetland and ecological management GIS system in urban by COMGIS secondary development technology，with a resource-based Tangshan city as a case.With the organic combination of spatial information in Ecological Park，subsidence information in subsidence area， and remote sensing data at different phases，an innovative database model GIS map is built.Then the secondary index of database link is realized.Combining of the artificial secondary wetland assessment，urban ecological treatment，and by means of building the information platform of graphic data and attribute data，an advanced platform is established for land reclamation，ecological treatment assessment and spatial analysis of mining subsidence.

Key words: Mining subsidence, Constructed wetland, GIS, Ecological treatment, Spatial data