Acute myocardial infarction interventions include the following: 1. coronary balloon dilation is an important step in coronary interventions, when there is a severe stenotic lesion after the guidewire passes, the stent may not be easily released, and the balloon should be used to pre-expand first; 2. coronary stent implantation, when the luminal stenosis of the coronary vessels is greater than 75%, coronary stent implantation is needed to implant a drug-coated stent in the stenosis site 3.Thrombus aspiration device, the basic principle is to attract thrombus by negative pressure, thus reducing the thrombus load in the coronary artery; 4.Microcatheter thrombolysis device, using a special syringe pump to inject thrombolytic drugs into the coronary artery, so that the coronary artery blood flow is reopened; 5.Distal vascular protection device, which can avoid or reduce thromboembolism in the microvessel, reduce the slow or no blood flow phenomenon. The distal vascular protection device can avoid or reduce microvascular thromboembolism, reduce the occurrence of slow or no blood flow, and reduce the incidence of acute myocardial infarction, which can immediately improve the therapeutic effect and improve the long-term prognosis.