Abstract: According to the relevant requirements of carrying out green mine work in Shandong Province, all open-pit gold mines must be transferred to the underground for underground mining, and the mine geological environment problems that have been caused must be restored and treated, so as to reduce the damage of mining activities to the ecological environment.Based on the geological environment background of Cangshang Gold Mine and the current situation of open-pit mining, this paper analyzes the geological environment problems of the mine, such as geological disasters, aquifer damage, landform and landscape damage caused by open-pit mining activities.The recovery and treatment methods of geological environment problems in Cangshang Gold Mine are studied, and the mine geological environment problems after the mine is transferred to underground mining are predicted.The research show that through tailings backfilling, slope seepage prevention, site restoration and other treatment measures, not only the problems of mine geological environment caused by open-pit mining are effectively repaired and the ecological geological environment of the mining area is restored, but also the problem of insufficient capacity of tailings pond of Sanshandao Gold Mine is solved, the cost of mine production and backfilling treatment is reduced, the intensive utilization rate of tailings resources is improved, and a large number of available land can be provided for the local area, It solves the problem of urban development space of Jincang Street, and has good economic, social and ecological benefits.