After the occurrence of acute non-ST-segment elevation myocardial infarction, bed rest should be given immediately, the environment should be kept quiet, visits should be reduced, adverse stimuli should be prevented, and anxiety should be relieved, oxygen therapy should be given, and electrocardiographic monitoring, blood pressure monitoring, and finger pulse oxygen monitoring should be performed. Establish intravenous access and intravenously order isosorbide mononitrate for coronary dilation therapy to improve cardiac circulation. Oral aspirin and clopidogrel were administered for antiplatelet aggregation therapy, and oral risuvastatin was administered for atherosclerotic plaque stabilization. Metoprolol and telmisartan are given for treatment according to blood pressure and heart rate. If the patient has significant chest pain, pethidine intramuscular injection or morphine subcutaneous injection may be given for pain management. Myocardial reperfusion therapy is recommended within 3-6 hours of onset, and at most within 12 hours. Interventional treatment may be preferred if available, and emergency coronary artery bypass grafting may be performed in individual cases.