Glaucoma is the second most common cause of irreversible blindness in the world.Glaucoma filtration surgery is the main treatment for glaucoma patients with intraocular pressure poorly controlled by drugs.Ideal functional filtering bleb is an important sign of success of the glaucoma filtration surgery.It is important to preserve the filtering bleb’s function by maintaining earlier filtering bleb and repairing dysfunctional filtering bleb.This review focuses on the maintenance of earlier filtering bleb and the repair of malfunction filtering bleb which is effective after glaucoma filtration surgery.