Abstract: Objective To explore the clinical effect of phacoemulsification combined with intraocular lens implantation in the treatment of angle closure glaucoma combined with cataract, and to provide theoretical basis for the clinical treatment of angle closure glaucoma combined with cataract. Methods From January 2016 to December 2018, 50 patients(68 eyes) with angle closure glaucoma and cataract who underwent phacoemulsification and intraocular lens implantation in the Second Affiliated Hospital of Hainan Medical College were included in the study to observe the postoperative complications and compare the intraocular pressure, the best vision, the opening distance of 500 m angle and the depth of anterior chamber before and after surgery changes. Results The best preoperative visual acuity was<0.1 in 12 eyes, 0.1≤vision<0.3 in 21 eyes, 0.3≤vision<0.5 in 25 eyes and ≥ 0.5 in 10 eyes. The best postoperative visual acuity was<0.1 in 2 eyes, 0.1≤vision<0.3 in 10 eyes, 0.3≤vision<0.5 in 20 eyes and ≥ 0.5 in 36 eyes. One month after operation, the best visual acuity of the patients was significantly higher than that before operation, the difference was statistically significant(Z=5.024, P<0.001), and the intraocular pressure of the patients before operation was significantly higher than that after operation. There was significant difference between the two groups(P<0.05), and the opening distance of 500 μm chamber angle and the depth of anterior chamber were significantly higher than those before operation(all P<0.05). The probability of postoperative complications was about 10.29%(7/68). Conclusion Phacoemulsification combined with intraocular lens implantation can reduce the intraocular pressure, deepen the anterior chamber, increase the open distance of the room angle, improve the vision and reduce the use of the medicine.