Drug-coated stent is a drug coating on the surface of traditional ordinary stent, commonly used drugs are paclitaxel, rapamycin and so on. This special stent can dilate blood vessels while inhibiting the proliferation of vascular endothelium through drugs, thus reducing the risk of in-stent restenosis. After the implantation of traditional common stents, due to the endothelial proliferation and platelet adhesion and aggregation, patients will have the possibility of restenosis and need to undergo another intervention or coronary artery bypass grafting surgery for treatment. Drug-coated stents reduce the possibility of stent-intrinsic stenosis, and the use of drug-coated stents, followed by anticoagulation after the procedure has become mainstream. Although drug-coated stents are good, they are much more expensive than ordinary stents, therefore, if the economic conditions permit, try to choose drug-coated stents, and when using ordinary stents, regular anticoagulation and antiplatelet therapy must be carried out after the operation.