Portal vein cavernous lesions in children are caused by malformation of the blood vessels at the portal vein into the liver due to infection, congenital malformations, etc., resulting in poor blood flow into the liver and thus portal hypertension. The main manifestations are upper gastrointestinal bleeding and hypersplenism. Current treatment is mainly symptomatic, such as surgically cutting the bleeding vein, removing the hyperactive spleen, and waiting for the child’s portal vein to spontaneously shunt, thus reducing the symptoms of portal hypertension. However, some children with high bleeding and poor spontaneous shunting ability require early intervention. The present mesenteric-portal shunt can divert blood from the portal vein, through the collateral branches, to the left branch of the portal vein, reducing the pressure in the portal vein and is ideal for the treatment of portal vein spongiformity in children. However, the procedure is determined by the diameter of the left branch of the portal vein and the degree of postoperative patency of the collateral branch, and success cannot be guaranteed in every child.