Abstract: In order to solve the support problem of coal roadway with compound roof under high stress condition, in this paper, based on the actual engineering situation, the FLAC^3D numerical simulation software is used to contrast and analyze the displacement of surrounding rock and the additional stress field of bolt under different pre-tightening conditions. The study shows that high strength pre-tightening force can obviously control the displacement of surrounding rock, and the anchoring pressure zone between the anchor bolts is superimposed with each other to form a certain thickness of the pressure arch, and the bearing capacity of the surrounding rock is improved. Finally, the high strength pre-tightening support scheme is proposed and applied to the field, the monitoring result shows that the proposed scheme is reasonable and feasible.