Malignant glaucoma is a serious complication after cataract surgery. Post-cataract ciliary ring block glaucoma refers to ciliary ring block closed-angle glaucoma with persistent shallow anterior chamber and high intraocular pressure that occurs after cataract surgery excluding pupillary block, choroidal leakage or choroidal diverticular hemorrhage. Ciliary muscle paralyzing agents can sometimes be effective in relieving the condition. If drug therapy is not effective, Nd:YAG laser excision of the lens capsule and the anterior vitreous membrane at the peripheral iridotomy 121 may be tried. The vitrectomy procedure should focus on removing the anterior and posterior lens capsule, part of the suspensory ligament and the anterior vitreous membrane after the peripheral iridotomy 121, thus completely removing the ciliary ring block and establishing the atrial aqueous pathway from the vitreous cavity to the anterior chamber.