In order to obtain the pressure relief effect of the protected layer under double upper protective layer superposition mining，and the interaction between protective layers. Taking the No. 1 mining area of Pingmei No. 8 coal mine as the engineering background, numerical simulation is used to study the stress distribution law of superposition mining of Ding and Wu coal seams with multiple working faces. The research results show that, when only a single working face of Group Ding is mined to protect the Ji coal seam, stress concentration value of coal pillars at the working face boundary is about 19MPa, the influence range reaches 80m below, the maximum pressure relief value is about 1MPa. When the Group Ding multi-faces protect the Group Ji, the maximum stress value of the sectional coal pillars of Group Ding reaches 39MPa, but the transmission range to the bottom plate is only 26m, the maximum pressure relief value is 2.0MPa. When Group Ding and Group Wu coal seams are overlapped mining with multiple working faces, and the working face and coal pillar are staggered, the stress concentration weakening of the sectional coal pillars, and it is conducive to pressure relief. The stress value of sectional coal pillars is unloaded from 39 MPa to 10 MPa, and the maximum pressure relief value of Group Ji is 6.5 MPa. When a single working face of Group Wu protects the coal seam of Group Ji, the maximum pressure relief value of Group Ji is 4MPa. The double upper protective layer mining can enhance the pressure relief effect and reduce the concentrated stress of the sectional coal pillars. The pressure relief range of the Group Ji has been delineated based on the obtained stress distribution law, and formulated the mining scheme and pre pumping borehole layout scheme of the Ji coal seam working face.