The value of LDL after stenting should be controlled to below 1.7mmol/l, 2.6mmol/l and 1.4mmol/l respectively depending on the condition. LDL is an independent risk factor that can lead to coronary artery disease, so the LDL level in patients should be strictly controlled. For patients with critical conditions, the level of LDL should be controlled to below 1.7mmol/l. If the level of LDL is not controlled to below 1.7mmol/l, the condition of the patients with critical conditions may worsen, and may even be life-threatening; Patients with milder conditions need to be controlled to below 2.6mmol/l; patients with milder conditions should not exceed 2.6mmol/l, although the level in the body can be raised appropriately; Patients suffering from cerebral infarction and heart attack need to be controlled to below 1.4mmol/l; elevated LDL levels in these patients are more harmful to patients, so they need to be strictly controlled to below 1.4mmol/l. Secondly, it is recommended that patients with stents should take statins, such as atorvastatin, under the guidance of a doctor. Statins can lower the LDL levels in the patient’s body. It is recommended that during the period of taking the drugs, patients should go to the hospital regularly for follow-up, closely monitor whether the body’s LDL content is up to the standard, in addition, in terms of diet, do not eat greasy food.