Dietary fiber is divided into soluble and insoluble dietary fiber, both are indispensable to a healthy diet. Research has found that the ratio of insoluble dietary fiber to soluble dietary fiber is 2:1. Currently, the ratio of insoluble dietary fiber to soluble dietary fiber in middle-aged and elderly people is mostly 3:1, and insufficient intake of soluble dietary fiber is the biggest problem. Dietary fiber plays an important role in maintaining the health of the digestive system, and can prevent constipation and bowel cancer. Dietary fiber cleanses the digestive tract and enhances digestive function, dilutes and accelerates the elimination of carcinogens and toxic substances from food, protects the fragile digestive tract and prevents colon cancer: dietary fiber slows down the rate of absorption and promotes the excretion of cholesterol, so that blood glucose and cholesterol are controlled at the optimal level. Adequate intake of dietary fiber can prevent cardiovascular disease, diabetes and other chronic diseases. Soluble dietary fiber is more effective in lowering cholesterol, it has a strong water absorption, after absorbing water expansion, volume increased by 10-15 times, can increase the sense of satiety, but also reduce the absorption of fat in the food, to avoid excess calories and lead to excessive accumulation of fat in the body, not only to solve the problem of satiety and not starvation, but also to achieve the purpose of weight control and weight loss. Soluble dietary fiber exists in beans and fruits and vegetables, such as lemon, citrus, apple, pineapple, banana, cabbage, alfalfa, peas, fava beans and so on. In addition, konjac contains more soluble dietary fiber. Insoluble dietary fiber is more effective in laxative and colon cancer prevention. Insoluble dietary fiber is mostly found in whole grains and some multi-fiber vegetables. When middle-aged and elderly people eat refined white rice and noodles every morning and evening, it is best to match 2-3% of coarse grains to increase the intake of dietary fiber. Every day to fully intake of different varieties of vegetables, fruits, in order to supplement a variety of different ‘s dietary fiber, to achieve the purpose of health. Reminder: suffering from anorectal disease is not a long time to delay the disease, some of the anorectal disease for a long time without treatment will seriously harm the patient’s health, a long time without treatment is also prone to induce a variety of other anorectal diseases in one situation, which will seriously harm the patient’s physical health and affect the patient’s normal life, therefore, if you find yourself suffering from some kind of anorectal disease in life, some symptoms, it must be timely. Therefore, if you find yourself suffering from some symptoms of anorectal diseases in your life, you must go to a professional anorectal specialist hospital for examination and treatment in time.