Diabetes and coronary heart disease are both serious diseases, the pathogenesis of these two diseases are not quite the same, and both can be more dangerous to the health of patients, and diabetes and coronary heart disease are closely linked together. Because long-term hyperglycemia in diabetic patients can lead to coronary heart disease, many patients with coronary heart disease also have abnormal blood sugar metabolism or diabetes. Therefore, many diabetic patients should take oral medications, such as aspirin or statin lipid-lowering drugs, to protect the heart vessels to prevent the occurrence of coronary heart disease when performing diabetes treatment. In the treatment of coronary heart disease patients to use oral hypoglycemic drugs, such as metformin to treat abnormal blood sugar, so both diseases have a relatively large impact on the health of patients, patients need to pay equal attention.