Abstract: In order to solve the problem of remained roadway is hard to be reserve in large mining height panel, this paper uses the secondary grouting reinforcement technology. To analyze the the strata - press behaviors and the roadway's deformational and destructive law,make the plan of secondary grouting reinforcement, use the high-efficient materials, optimized design the process parameters of the secondary grouting reinforcement , through the field observation and FLAC3D numerical simulation to check and analyze the grouting results. The test and numerical simulation results both indicate that after grouting reinforced , the displace between both sides of remained roadway reduces more than 65%, roof to floor displacement reduces more than 51% ,this technology solves the problem of remained roadway is hard to be reserved effectively.