Whether the portal vein dilatation can be restored to normal or not, the causes of portal vein dilatation need to be checked, there are several kinds: 1.If the portal vein dilatation is caused by portal vein thrombosis, it can be restored, but it must be treated effectively, if the amount of thrombosis is large, it needs to do interventional thrombosis treatment, after that, together with taking anticoagulant drugs, when the thrombosis is cleared, the portal vein will be restored to normal. 2.The cause of portal vein dilatation The most common cause is liver cirrhosis and liver cancer, and it is not easy to recover the dilated portal vein, especially in severe cirrhosis, the dilated portal vein will not recover, but will also gradually aggravate to form portal hypertension. If the dilated portal vein is caused by liver cancer, the portal vein may return to normal after surgery.3. If the dilated portal vein is caused by liver stasis due to severe heart failure, the portal vein will be completely restored to normal after the heart failure is controlled.