Combined with roadway support situation under complex condition of No. 8 mining area of Yunjialing Mine, through whole dynamic control of bolt drawing force test, the reasonable prestressing force of prestressing, change and the surrounding rock of roadway deformation observation, bolt pre-tightening force decreasing rate and the deformation law of surrounding rock roadway was summarized, roadway advancing working face anchor bar pretightening force was adjusted based on formula, the technology extends the effective support cycle, reduces the workload of roadway maintenance.