The dislocation of biliary stent will lead to biliary obstruction, causing obstructive jaundice and poor biliary drainage, which will lead to the emergence of cholangitis septicemia and so on. Biliary stent is currently applied to malignant biliary obstruction caused by malignant tumors such as hepatocellular carcinoma, pancreatic carcinoma and metastatic carcinoma, and biliary stent can improve the local obstruction symptoms. After the biliary stent is dislodged, it will make the bile duct partially obstructed, the bile excretion is not smooth, affecting the normal digestive function, the bile can inhibit the growth of intestinal pathogenic bacteria, the biliary obstruction is easy to appear the symptoms of biliary tract infection. In severe cases, cholangitis septicemia may occur, and may even lead to the emergence of renal failure, and the infected bile may enter the blood circulation of the body, resulting in a series of clinical syndromes such as sepsis. If the above clinical symptoms occur after the bile duct stent is inserted, it is necessary to consult a doctor in time, improve the relevant examination, determine the position of the stent, prevent the stent from detaching, and avoid the deterioration of the situation.