The characteristics of type 2 diabetes in the elderly include: 1. high incidence: the incidence of diabetes in the elderly is increasing year by year; 2. combined cardiovascular and cerebrovascular diseases: it also includes the combination of some peripheral vascular diseases and microvascular lesions; 3. depending on whether the patient has comorbidities or not, the patient will have different expectations and target values for medication; 4. individualized treatment of diabetes in the elderly; 5. compliance with medication is poor, and sometimes medication is often discontinued or stopped privately; 6. due to older age, diabetes is found later and blood glucose levels are often higher.