Acute enteritis is commonly known as “diarrhea”. “Diarrhea is very common in clinical practice. It is often caused by eating an unclean diet, bacterial or viral infections, and mental depression. Acute enteritis is the most common intestinal disease in summer and fall. The main symptoms are abdominal pain, diarrhea, stools are watery, fewer than a few times a day, more than a dozen times, or even more, a great impact on human health. For patients with acute enteritis, in addition to attention to rest and active treatment for the cause, the diet should take the principles of easy digestion, less stimulation, moderate temperature and heat, nutritious, small meals and timely supplementation of water. Dietary principles of enteritis in different periods are as follows: First, the early stage of enteritis: this period is the stage of acute congestion, edema, inflammation and exudation of the intestinal mucosa, at this time, active intestinal peristalsis or intestinal spasm, and its digestive and absorptive functions are relatively weak, often manifested as abdominal pain, stools more often. Therefore, in the first 8 to 12 hours after the onset of the disease, the patient first temporary fasting, to avoid continuous stimulation of the intestinal tract, so that the intestinal tract have “rest and recuperation”. After that, you can eat first fluid food, such as rice porridge, lotus root powder, egg batter, fine noodles, braised thin noodles. If the diarrhea is severe or sweat more, should also be appropriate to give the patient more soup, such as rice juice, vegetable soup, fruit juice, light salt water, etc., in order to replenish the body of water, vitamins and electrolyte deficiencies. If necessary, go to the hospital for rehydration therapy. Second, enteritis improvement period: can give the patient some easy to digest and nutritious fluid or semi-fluid food, such as rice porridge, fine noodles, steamed egg custard, salted cookies and so on. It is appropriate to adopt the method of small meals and eat 4~5 times a day. It should be noted that at this time, it is not advisable to drink milk and eat a lot of sugar, because these foods into the intestinal tract is easy to ferment and produce a lot of gas, causing abdominal distension and abdominal pain, increasing the patient’s pain. In addition, milk contains more fat, fat has lubrication of the intestinal tract, stimulate intestinal peristalsis effect, can increase the burden on the intestinal tract, is not conducive to the condition. Third, enteritis recovery period: due to the gastrointestinal tract, especially intestinal pathophysiological changes, this time the intestinal tract is very sensitive to food. And the intestinal tract has a certain “memory” function. For once caused by the intestinal tract “unhappy” food, eating again will appear acute enteritis symptoms, or repeated, lingering. Therefore, although acute enteritis has improved, we should pay attention to the diet, weaken the intestinal bad memory function, to avoid causing intestinal dysfunction, affecting the quality of life. Therefore, the recovery period still need to pay special attention to dietary restraint, diet should eat some light, soft, warm food, avoid prematurely eating fat, fried, cold and hard food, as well as multi-fiber food, such as celery, leeks, garlic clover and so on. After the diarrhea stops, you can supply low-fat, less residue semi-fluid diet, or soft rice, small amount of meals, in order to facilitate digestion and absorption. Such as noodles, porridge, steamed bread, soft rice, lean meat puree and so on. However, it is still necessary to limit the vegetables and fruits containing much crude fiber, etc., and then gradually transition to the general diet.