Our hospital began exploring the treatment of intrahepatic bile duct stone disease back in the 1960s, and in the 1990s began to develop its own distinctive feature, which is the OSPCHS procedure. This procedure preserves the function of the sphincter of Oddi and emphasizes the removal of lesions upstream of the bile duct, performing resection of the diseased liver and plastic surgery of bile duct strictures. In case of recurrence of intrahepatic bile duct stones, the patient can simply cut the skin subcutaneously, open the subcutaneous channel, and remove the stones with a choledochoscope to avoid another major surgery. Minimally invasive secondary surgery.