Abstract: We mainly introduce the backfill mining working face with super-high water bag and process and strata behaviors of gob-side entry retaining in auxiliary roadway. Through backfill mining with super-high water bag in the gob and gob-side entry retaining in the auxiliary roadway, which not only effectively controls the failure and movement of overlying rock, but also slows down the strata behaviors and has a good control of the auxiliary roadway.