There is no definite time for discharge after cardiac stent surgery, the specific time needs to be given by the clinician after comprehensive assessment of the patient’s condition. 1. If the patient has angina pectoris and comes to the hospital for stent implantation on an elective basis, and the patient does not have other major illnesses or discomfort, the patient can be discharged in 2-5 days after stent placement and observation of the patient’s stable condition. 2. If the patient is admitted to the hospital urgently because of acute myocardial infarction, and the intervention opens the blocked coronary artery and places a stent, most of the time it takes more than one week to stabilize and observe the patient’s condition, and the patient can be discharged from the hospital if there is no special abnormality. In either case, it should be ensured that the patient’s condition is stable, there is no risk of another acute attack, and the relevant indicators tend to be normal or have been normalized before the patient can be discharged.