Foods that are easy to form slag in the intestinal tract are mainly foods that contain more fiber, including coarse grains, fruits and vegetables that contain more fiber. 1. Roughage foods: Foods that are easy to form slag in the intestinal tract mainly include rice bran, corn, cereal, beans, millet, and so on. 2. Fruits: such as apples, bananas, peaches, citrus, pears, peaches, watermelon and so on. 3. Vegetables: vegetables containing more fiber are spinach, leeks, celery, carrots, cabbage and so on. Easy to form slag in the intestinal tract of food, rich in dietary fiber, that is, high-fiber food. Not easy to be digested and absorbed by the intestines, can promote intestinal peristalsis, for patients with constipation have certain benefits.