Abstract: Aiming at the movement characteristics and stress distribution law of multi-key strata groups in overlying strata during the deep mining process, this paper comprehensively applies theoretical analysis and numerical simulation methods to study, revealing that there are several key strata above the deep working face in a mine under the conditions of deep mining, among which 6.88 m fine sandstone is low key strata, and 9.66 m fine sandstone is high key strata.Each key strata, especially the lower key strata, goes through the stages of fracture and caving, accompanied by the phenomenon of stress redistribution.Because of its large thickness and high strength, the upper key strata becomes the key factor affecting the stability of overlying rock, and its periodic fracture directly leads to periodic pressure of working face.In addition, the stress distribution above the goaf and around the coal wall is analyzed in detail.The principal stress of the two sides reaches a peak value of 21.34 MPa when the working face advances 100 meters and then begins to decrease, and finally a stable stress distribution pattern is formed after the rock mass is compacting in the middle of the goaf.