Once the disease is diagnosed, cyst removal and bile duct reconstruction surgery should be performed as soon as possible. Surgery should follow the following principles: 1, eliminate the pathology causing PBM, so that the pancreaticobiliary shunt; 2, restore the smooth excretion of bile into the intestinal tract, try to prevent or reduce the reflux of digestive juices to the biliary tract; 3, the newly built bile ducts should not be angular, anastomoses should be wide in order to prevent stenosis, anastomoses should not be tense, and the blood circulation should be good; 4, after reconstruction of the anastomotic area without a potential focus of infection; 5, cyst should be resected completely, without residue. The cyst should be removed completely and there should be no residue. The main surgical modalities are: 1, external drainage (B-type ultrasound-guided trocar puncture cyst drainage or small dissection of the cyst built-in tube external drainage); 2, internal drainage (including cyst duodenal anastomosis or cyst jejunostomy Roux-Y anastomosis); 3, cyst resection, biliary reconstruction (including hepatic-jejunostomy Roux-Y anastomosis biliary reconstruction, hepatic-jejunal anastomosis biliary reconstruction, jejunostomy), intermediate biliary reconstruction. interstitial biliary reconstruction), of which, hepaticojejunal Roux-Y anastomosis biliary reconstruction is the procedure of choice for the treatment of congenital choledochal cysts.