The liver can usually regenerate after being cut in half, which should be determined by the condition of the patient’s liver function. Patients with pre-existing liver disease are usually more difficult to return to normal, and normal healthy individuals can return to normal. Regeneration of the liver refers to the rest of the liver cells through cell division to restore the liver volume to the preoperative size to meet the patient’s functional needs. 1. Patients with previous liver diseases: If the patient has suffered from chronic hepatitis, severe fatty liver, cirrhosis and other liver diseases, at this time the patient’s liver has obvious fibrosis or formed pseudo lobe, so the regeneration ability of the liver is weaker, it may not be able to regenerate or recover to the size of the liver before resection. 2. Normal healthy people: if a healthy person is surgically removed half of the liver, after strong liver regeneration ability, the volume of the liver after surgery can be increased to normal to meet the functional needs of the human body. Whether or not a patient with half of his liver removed can grow to normal size depends on the patient’s physical condition and past medical history. It is recommended that the patient go to a regular hospital for a specific assessment by a doctor.