There is no grading of biliary stents, and the stents commonly used in clinical practice are braided mesh stents made of titanium and nickel shape memory alloys and polyethylene plastic stents. The biliary system has the function of secreting, storing, concentrating and transporting bile, and has an important regulatory role in the discharge of bile into the duodenum. Malignant biliary obstruction caused by malignant tumors such as cholangiocarcinoma, hepatocellular carcinoma, pancreatic carcinoma and metastatic carcinoma has a high morbidity rate and is often found at an advanced stage. Implanting a biliary stent into the site of stenosis or obstruction is currently the better treatment for biliary obstruction. Biliary stenting for malignant biliary obstruction is a minimally invasive treatment that can be repeated and can effectively relieve malignant biliary obstruction. The commonly used stents in the clinic are braided mesh stents made of titanium and nickel shape memory alloys and polyethylene plastic stents. After the operation, the patient’s vital signs, bile drainage and the position of the biliary stent should be observed, and if there is any discomfort, the attending physician should be contacted promptly.