Intrahepatic portosystemic shunt is a surgical procedure for the treatment of portal hypertension. There are a number of surgical procedures for portal hypertension, and the commonly used ones are shunt, shunt interruption and complex surgery, and liver transplantation. Intrahepatic portosystemic shunt is a type of surgery that achieves hemostasis by establishing a shunt channel between the portal and vena cava systems and lowering the pressure in the portal vein. Intrahepatic portosystemic shunt has the advantages of good pressure lowering effect and low rebleeding rate, but at the same time, it has the disadvantages of postoperative damage to liver function (not applicable to patients with poor liver function) and high incidence of postoperative hepatic encephalopathy, so it is more suitable for those who have a history of esophagogastric variceal rupture bleeding accompanied by bleeding with obvious portal hypertensive gastropathy and bleeding again after the flow-control surgery. Shunt surgery can be divided into two categories: non-selective shunt surgery and selective shunt surgery (including restrictive shunt). 1. Non-selective shunt: the representative operation includes end-side shunt of portal vein and inferior vena cava, side-side shunt of portal vein and inferior vena cava, and proximal splenic-renal shunt, etc. It has better effect on esophagogastric fundal varices rupture hemorrhage, but it is prone to occurrence of hepatic encephalopathy after the operation. 2. Selective shunt: the representative operation is distal spleno-renal shunt, with low incidence of postoperative hepatic encephalopathy, but it is not suitable for patients with large amount of ascites and small caliber of splenic vein.