Patients with severe constipation need to eat a light, easily digestible diet with more vitamins and fiber. In the morning, you can drink oatmeal and soy milk or milk, and eat pasta or foods containing more fiber and pectin such as bananas and apples, which have the effect of laxative and laxative. At noon, you can eat rice or pasta and celery, leeks, cabbage and other vegetables containing more fiber, avoid spicy, stimulating and fatty foods, half an hour after the meal to eat apples, pears, peaches and other fruits containing more fiber and pectin. Dinner needs to be a light diet, eat some thin porridge and vegetables, fruits, pay attention to quit smoking, quit drinking, eat more fresh vegetables and fruits, drink more water, drink about 2000ml of water a day, drink warm honey water in the morning after waking up, with the effect of laxative.