Abstract Liver cancer is a common malignant tumor in China. The incidence of malnutrition is high in patients with liver cancer， the main reasons affecting their nutritional status at the time of the first hospitalization are the degree of liver damage and the tumor-burdened state. The anti-tumor treatment measures such as liver resection， radiotherapy， chemotherapy and targeted therapy can further aggravate the liver function injury and worsen the nutritional status. Medical nutrition intervention is an important part of the treatment of liver cancer. The standardized diagnosis and treatment procedures for the medical nutrition treatment of liver cancer patients include： “screening， assessment， and intervention”. Nutritional risk screening （e.g.， nutritional risk screening 2002） is used to identify patients requiring nutritional treatment. Malnutrition was diagnosed by means of patient-generated subjective nutrition assessment（PG-SGA） and liver function was assessed by laboratory examination and Child-Pugh classification grading. Energy and protein supply targets are determined according to the metabolic capacity and body demand of liver cancer patients. Oral nutritional supplement is the first choice for liver cancer patients with nutritional risk or malnutrition. For those who cannot meet 60% of the energy supply of enteral nutrition or cannot accept enteral nutrition， supplemental parenteral nutrition should be given timely to maintain nutritional status， improve he compliance of anti-tumor treatment and improve clinical prognosis. Abnormal liver function in patients with liver cancer can lead to the deficiency of various trace elements and vitamins， timely and appropriate supplementation of micronutrients has positive significance for improving nutritional status and maintaining liver function in patients with liver cancer.
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