First, the difference between enteral nutrition and parenteral nutrition: 1, enteral nutrition is supplemented to the gastrointestinal tract by oral and nasal feeding for digestion and absorption. Parenteral nutrition was supplemented by intravenous injection and blood circulation. 2. Enteral nutrition is comprehensive and balanced. Parenteral nutrition supplements are relatively simple in nutrients. 3. Enteral nutrition can be used continuously for a long time. Parenteral nutrition can only be used in a specific short term. 4. Long-term use of enteral nutrition can improve gastrointestinal function, enhance physical fitness and improve various physiological functions. Long-term use of parenteral nutrition can lead to the decline of gastrointestinal function and various physiological functions disorder. 5. The cost of enteral nutrition is low. Parenteral nutrition costs a lot. 6. Enteral nutrition has fewer complications and is relatively safe. Parenteral nutrition has high complications. Second, the advantage of enteral nutrition 1 can provide a variety of nutrients and trace elements that meet the physiological needs and improve the overall nutritional status of patients. 2, directly nourish the gastrointestinal tract and effectively maintain the normal physiological function of the digestive system. 3. Protect the gastrointestinal mucosal barrier and prevent bacterial translocation. 4. Promote the secretion of immunoglobulin and gastrointestinal hormones, improve the body's immunity, and reduce postoperative infections and complications. 5. Reduce hypercatabolism and improve nitrogen balance. 6. Medical expenses are more economical, hospitalization days are shorter, and treatment costs are lower.