Improved bile duct stent

The invention provides an improved bile duct stent which comprises a main pipe body, the main pipe body is of a hollow tubular structure, one side of the main pipe body is inserted into a bile duct and fixed to the inner wall of the bile duct through a wire connecting piece, the wire connecting piece is made of an absorbable material, and when the wire connecting piece is disengaged from the inner wall of the bile duct, the bile duct stent can be discharged along with duodenum peristalsis; an anti-backflow piece is arranged on the side, away from the wire connecting piece, of the main catheter body so as to abut against the duodenum wall, and the bile duct support is prevented from entering the liver in a retrograde mode. The laparoscopic common bile duct exploration and the placement of the improved self-dropping biliary stent in the operation are combined, so that related complications caused by first-stage suture of the bile duct can be reduced, the postoperative life quality of a patient suffering from bi