Patients with diabetes mellitus have poor systemic and local resistance and are prone to infection, the surgical incision is not easy to heal, the blood vessels are brittle and prone to bleeding, and the local reaction after surgery is greater than that of ordinary patients. Therefore, after cataract surgery, diabetic patients should pay more attention to diet and living, actively cooperate with doctors, take medication on time, control diet, and keep blood sugar in normal range as much as possible. During the recuperation time, pay attention to the diet structure, eat more easily digestible, nutritious and less sugary diet, do not eat hard, difficult to chew and irritating food, and be gentle when using local eye drops to avoid damage to the eyes.