Abstract: This thesis is mainly focused on the concept，research methods and content of deposit geo-environment model. Dexing copper mine is set as an example here. In this thesis, there is detailed description about the geologic and trace element geochemical features, as long as the total amount of heavy metal component that has been released to the environment of Dexing copper mine before it has been put into operation. In order to study the environmental characteristics before operation of Dexing copper mine, samples from Dawu River and No.4 tailings dam were collected in field and analyzed in laboratory to ascertain the metal content. With the help of elemental speciation analysis，environmental mineral analysis and stimulation of in-door pollutant migration, the environmental impact of heavy metals during mining operation was discussed in details. Meanwhile, the No.1 tailing dam which has been rehabilitated after pit-closing is used as an objective to probe into the environmental features of some functional area.