Treatment principles: 1. The dietary treatment principle for patients with hepatic encephalopathy is to control the total energy and protein and reduce the metabolic production of ammonia in the body. Energy supply should be properly controlled, and a daily supply of about 6.7MJ (1600kcal) is appropriate. The diet should be based on carbohydrates (cereals, pasta and other starchy foods), which should account for 75% of the total energy; 2. For comatose patients, protein is forbidden in the first few days, and carbohydrate-based food is supplied, with adequate daily supply of calories and vitamins. After waking up, protein diet can be gradually increased, starting with 20g per day, and then increasing by 10g every 3 – 5 days, but not more than 60g/day in the short term. When hepatic coma occurs again, the protein intake should be immediately reduced to 20g-30g per day; during the period without symptoms of hepatic encephalopathy, the daily protein intake can be around 60g, and protein-rich foods such as eggs, milk, cheese, lean meat, fish and chicken can be consumed alternately, just pay attention to control the daily total. When the blood ammonia is elevated but the symptoms are not obvious, 30-40g of protein per day is appropriate; 3. Because fat can provide essential fatty acids and fat-soluble vitamins, and can laxative. The amount of fat in the diet should be 40-50g per day; 4. The supply of vitamins should be sufficient, especially the supply of vitamin C should be more, in order to facilitate detoxification. Low-protein diet often leads to a lack of calcium, iron, vitamin B2, vitamin K, etc., which should be supplemented outside the diet. Studies have shown that copper and zinc in the brain are reduced in liver failure, which may be one of the causes of hepatic coma, therefore, zinc and copper supplementation should be paid attention to in the dietary treatment; 5. If there is no ascites or edema, salt restriction is not necessary. If there is ascites or edema, a low-salt diet should be given and fluid restriction is required: daily sodium intake should not exceed 500 mg and fluid intake should be restricted to about 800-1500 ml according to the degree of ascites.