Objective To observe the clinical efficacy of phacoemulsification for cataract patients after glaucoma filtration surgery. Methods 68 eyes of 68 cases with primary angle-closure glaucoma had undergone glaucoma filtration surgery for more than 6 months and developed cataract. Phacoemulsification combined with intraoeular lens implantation were preformed. Postoperative follow-up was 3 to 36 months. The visual acuity, intraocular pressure, anterior chamber depth and corneal endothelial cell counts were observed and compared with pre-operative data. Results The visual acuity of 68 eyes improved in different degrees postoperatively, and the visual acuity of 66 eyes (97.06%) were 0.3 - 1.0. The intraocular pressure of postoperation was normal and increased compared with preoperative one. The depth of anterior chamber increased compared with that before surgery and the difference was statistically significant. Corneal endothelial cell density before and after operation were (2286.32 ±336.22) cells/ram2 and (2167 ±346.32) cells/mm^2 respectively. There was no statistically significant difference between them ( t = - 0. 59, P = 0. 613 ). Conclusion After phacoemulsification in cataract patients who underwent glaucoma filtration surgeries, the visual acuity recovered well, the depth of anterior chamber increases and the intraocular pressure is stable. Key words: Phacomulsification; Cataract ; Glaucoma, postoperative