Abstract: As the shallow resources are drying up,metal mines have to explorate mining resources in deep area.Influenced by high stress of rock mass in deep area,mining stope structure in shallow area is not quite suitable to the deep area.Based on the existence and changes of deep rock mass stress,and combined with the deformation rule of deep surrounding rock in the stope and the issue of ground pressure,this paper disscusses the way to scientifically and reasonably use sill-free sublevel caving mining method under the condition of high stress in order to effectively control the ground pressure,moreover,realizing the purpose of depressurized mining and extracting rocks sucessfully.