Glaucoma is one of the main causes of blindness in China. The higher the intraocular pressure, the severer the optic nerve injury. Lowering the intraocular pressure is the main treatment of delaying the progression in glaucoma optic nerve damage, and surgery is the chief strategy of lowering the intraocular pressure. At present, the device implantation has become more and more popular among different types of surgical treatment of glaucoma due to its safety, efficacy, fewer complications. This article introduces briefly the new device implantation--XEN gel stent drainage device.