The energy source of intravenous nutrition is glucose, and the dual-energy intravenous nutrition solution with fat emulsion is beneficial to maintain the body’s protein synthesis and energy needs. When the condition gradually improves, it should be changed to trans-intestinal nutrition. After liver cancer surgery, the normal digestive and absorption function of digestive tract is affected, which will produce symptoms such as anorexia, nausea and poor appetite. Sometimes the appetite is still fine but cannot be eaten, so the patient must be encouraged to start from the simplest diet. When giving intravenous nutrition, half amount of clear liquid food can be given first, and then full amount of clear liquid food can be given later, mainly rice soup, vegetable juice, and overdose broth. If there is no complication, half-quantity semi-liquid diet with less residue can be given after 10 days, and then gradually increase the quality and quantity of diet. Patients with hepatocellular carcinoma should adopt small amount and multiple meals, avoid greasy food, give light and tasty food with fresh vegetables, fruits and less stimulating food. More cooking methods such as steaming, stewing, boiling, blanching and mixing should be used, and the amount of various seasonings should be reduced. When post-operative patients receive chemotherapy, they will have many symptoms, which are often chemotherapy reactions, poor nausea, nausea, vomiting, reduced white blood cells, hair loss, etc.. The diet should be gradually adjusted according to the patient’s specific situation, with a light, thick liquid diet with less oil. We should pay attention to the cooking method, the food should be extremely fine and soft, easy to swallow, and easy to digest and absorb, we should pay attention to the vitamin, mineral and trace element supplementation, and if necessary, we can use fruits to fill the hunger.