After gallstone surgery, the incidence of common bile duct stones in patients is actually greatly reduced. This is because clinically 95% of common bile duct stones are secondary to gallbladder stones and only about 5% are primary. Therefore, for the recurrence of stones after gallbladder surgery, the main concern is more about the occurrence of intrahepatic bile duct stones. They are mainly caused by abnormal anatomical relationships within the patient’s bile duct, or by bacterial infections, parasitic infections, and abnormal drug metabolism within the bile duct. Gallbladder stones are not related to common bile duct stones. Gallbladder stones are produced in the middle of the gallbladder and common bile duct stones are produced in the middle of the common bile duct. After the patient’s gallbladder is removed, abnormal anatomical relationships or bacterial infections occur inside the common bile duct. The bile duct stones are soft, loose and muddy. In the early stage, the patient may not have jaundice, but the patient’s biliary tract infection will lead to increased obstruction, and the patient will develop jaundice, fever, abdominal pain, etc., and even aggravation will lead to shock or impaired consciousness, etc. The diagnosis can be clearly made by abdominal ultrasound or CT, and surgery or ERCP treatment will be considered after diagnosis.