The contraindications for diabetic patients after the placement of cardiac stents are non-compliance with the doctor’s prescription of medication, such as the failure to reasonably use antiplatelet drugs, lipid-lowering drugs and hypoglycemic drugs, resulting in restenosis of the blood vessels; irrational diet, such as excessive intake of high oil, high cholesterol, high-sugar foods resulting in unstable blood glucose control; and inappropriate physical exercise. 1. Avoid not following the doctor’s instructions to use drugs: cardiac stenting, is due to the treatment of coronary artery stenosis, blockage of the interventional therapy, can help the coronary arteries to restore smooth, so that the local myocardium to restore a more blood supply. However, stent belongs to a foreign body, usually need to take anti-platelet drugs and lipid-lowering drugs for a long time, if stopped too soon, may appear in the stent restenosis. For patients after stent surgery, blood sugar control also need to pay attention to, unstable blood sugar will aggravate vasculopathy, so diabetes stents need to be standardized under the guidance of the doctor medication. 2. Avoid unreasonable diet: high oil, high cholesterol, high sugar food should be reduced intake, otherwise it is easy to lead to poor glycemic control, lipid metabolism disorders, which will aggravate coronary atherosclerosis and other problems. 3. Avoid improper exercise: strenuous exercise is not recommended after placing a stent for diabetes. Exercise should be gradual, after placing the stent, just started to exercise, to feel no panic as the standard. Morning running, walking, swimming, cycling and other sports can be moderate. If there is any discomfort after placing a stent for diabetes, it is recommended to consult a doctor and follow the doctor’s instructions.