Given the prevalence of malnutrition in patients with CD, it is recommended that patients consume a daily diet formula that is high in calories, high in protein, low in fat, and rich in vitamins and essential micronutrients, and that 2-3 supplemental or enteral nutrition be added to the three daily meals. Although no balanced diet formula has been universally accepted, the general principle is that a balanced diet should be consumed in small portions. From the perspective of controlling disease activity, the addition of enteral nutrition is safer and more effective in controlling the disease than eating a regular diet. Most people with CD are aware that specific foods may cause a relapse or exacerbation of the disease, so patients should create a dietary profile to record which foods exacerbate GI symptoms. If these “offender foods” are well avoided, certain GI symptoms become relatively easy to manage. For most patients, eating more of the following foods may aggravate the disease or even cause a relapse: 1, grilled meat, bacon, fried foods (such as Western-style fast food) 2, red meat (steak, etc.) and poultry with skin 3, butter and other animal oils, margarine, bread sauce, mayonnaise, etc. 4, dairy products (if lactose intolerance, it is more important to avoid) 5, alcohol (beer, white wine, cocktails, etc.) 6. Carbonated beverages, coffee, strong tea, chocolate, popcorn, etc. 7, unripe fruits and raw vegetables (such as vegetable salad, etc.) 8, gas-producing foods (lentils, soybeans, cabbage, cauliflower, onions, etc.) 9, foods containing more bran (for cases such as intestinal stenosis) 10, spicy foods (spicy hot pot) Among them, for patients with intestinal stenosis / incomplete intestinal obstruction, you need to enter a low residue diet, avoid Eat coarse grains, tortillas, nuts, vegetables and other high-fiber foods to avoid excessive food residues to aggravate the obstruction. Enteral nutrition should be considered for such patients. For intolerant foods, a change in cooking method may reduce this intolerance; for example, if eating a vegetable salad causes diarrhea, it does not mean that it is intolerant to that vegetable and may not cause gastrointestinal symptoms if cooked vegetables are eaten instead. Assuming steatorrhea occurs with the consumption of beef or pork, this can be changed to low-fat fish as the main source of protein.