Diabetic retinopathy, a major ocular complication of diabetes, is one of the four major blinding eye diseases in China. The incidence is higher if there is also a systemic combination of hypertension, hyperlipidemia, and significant changes in blood rheology. In patients with type II pond urine disease of 20 years’ duration, the incidence of oral hypoglycemic drugs is 60%, and that of insulin injections is 84%. It can be seen that the existing glucose-lowering drugs do not reduce its occurrence and development. Diabetic retinopathy is clinically divided into two types and six stages: simple type (stage I-III). Patients may be completely asymptomatic and have little effect on vision. The main manifestations are fundus retinal hemangioma, hard exudate, soft exudate, and hemorrhage. The proliferative type (stage IV-VI) is prone to intraocular hemorrhage and other serious complications, vision loss, and even blindness. At this time, even if the blood sugar is controlled and the systemic status is improved. It cannot reverse the ocular pathological process and must be combined with local treatment to stabilize the lesion. The main manifestations are retinal neovascularization, vitreous blood accumulation, fibrous tissue proliferation and retinal detachment. How to prevent and treat: 1. Active control of diabetes. 2. Anti-platelet clotting drugs, such as aspirin and pentoxifylline. In case of fundus hemorrhage, use of Anilorubin, Rutin, Antoiodine, etc. 3. Laser treatment, before the lesion progresses to stage IV, laser treatment is used at the right time, which can protect the patient’s vision. 4. Surgical treatment, when intraocular vitreous hemorrhage and retinal detachment. Vitrectomy can be performed to remove intraocular blood accumulation and release and reset the retina.