Malabsorption syndrome is a clinical syndrome caused by inadequate absorption of nutrients from the small intestine due to various diseases. It usually refers to malabsorption disorders caused by defects in digestion or absorption or both. Below we share with you some knowledge about the nutritional aspects of malabsorption syndrome. Resulting nutritional deficiencies: 1. protein (amino acids), energy; 2. carbohydrates; 3. fatty acids; 4. fat-soluble vitamins A, D, E and K; 5. inorganic salts: sodium, potassium, calcium, chloride, iron and zinc; 6. water. Nutritional treatment: 1. Intravenous rehydration to correct fluid and electrolyte imbalance; 2. In severe cases, parenteral nutrition support should be used first: 3. When intestinal function allows, elemental or short peptide enteral nutrition preparations should be given, either orally or nasally 4. Energy supply should be adequate 30-35 Kcal/(kg.d) 5. Nitrogen 0.2g/(kg.d) 6. Intravenous or enteral route supplementation of calcium, magnesium, iron, vitamin B12, folic acid, fat-soluble vitamins A, D, K, etc.; 7, appropriate to limit dietary fat intake, less than 30 grams per day; 8, less residue principle to avoid the intake of food with high crude fiber content; 9, a small number of meals, more than six meals per day; 10, high-quality nutrient supplementation with treatment.