Abstract: Objective To investigate the therapeutic effect of phacoemulsification for primary closed-angle glaucoma complicated with cataract. Methods Phacoemulsification with posterior chamber foldable intraocular lens implantation was performed in 55 cases (58 eyes) of acute or chronic primary closed-angle glaucoma complicated with cataract. The changes of visual acuity, intraocular pressure, central anterior chamber depth and anterior chamber angle were observed after operation and the patients were followed up for 6 months. Results Compared with those before operation, the postoperative best corrected visual acuity and anterior chamber depth were improved, the intraocular pressure was reduced, and the closed chamber angle was partially reopened. Conclusion Phacoemulsification with posterior chamber foldable intraocular lens implantation not only improves the visual acuity but also controls the intraocular pressure, and can be a valuable method for treating primary closed-angle glaucoma with cataract.