For the diet of the elderly, ancient doctors have put forward many classical treatises, which have positive guidance for modern people. Zhu Danxi advocates that the elderly should eat a light diet to nourish their yin and avoid thick and spicy food, as he believes that too much thick food can easily lead to diseases in the elderly, so he advocates light food to nourish their health. He wrote the “Treatise on Lightness”, which is especially careful about the diet of the elderly. “The elderly within the deficiency of the spleen is weak, Yin deficiency is anxious, within the deficiency of stomach heat is easy to hunger and food, the spleen is weak and difficult to be food has been and then drink full, Yin deficiency is difficult to fall is depressed and phlegm, …… so the hot nature of things, charcoal fire production, gas of spicy, taste of sweet and greasy, it is clear that they can not eat. …… vertical mouth solid fast for a while, the accumulation of a long time will be a disaster”. It can be seen that Zhu pointed out the correct cooking method suitable for the elderly health meals. The “book of old age and family” written by Chen Zhi is a monograph on old age and health, and the core of health care is to focus on the diet. It is pointed out that “people in their senior years should not be full at all, but eat frequently, so that the spleen and stomach can be easily transformed and the grain gas can be kept. If you make a full meal, you will be full of injuries”, “the so-called gourmet food, not the land and water are all ready, the foreign products are also called Jane shame, to care about raw and cold do not eat, dust and hard do not eat, do not force food, do not force drink, first hunger and food, food is not full, first thirsty and drink, drink is not too much”. It is pointed out that the elderly should not eat too much at one time, but should pay attention to eating less and more meals, so that the spleen and stomach can easily digest food, if the diet is too full, it will damage the spleen and stomach. It is also pointed out that the so-called gourmet food is not exotic and exotic products, but to pay attention to eating less cold and hard food, not to eat too much, and not to drink too much water. All these discussions emphasize that the elderly should pay attention to the diet that is not too full and the diet that is fine and soft. Food first, then medicine, the old age NPC method The old people, the body tends to decline, the organs gradually loss, the vital energy does not continue, at this time all rely on “the day of the people, the essence of the living people” diet to regenerate the “essence of the spirit”. Therefore, Chen Zhi emphasizes that the elderly should take food before medicine in the sequence of food and medicine, which is the great method for the elderly. In the book of the elderly, it is said that “the medicine and bait for the elderly is only a supportive method, and can only be used to warm and smooth the qi, eat to nourish the deficiency, and neutralize the medicine to treat the …… then adjust the diet, according to the food doctor’s method, with the food nature of the change of food to treat, this is also the most good”. This is the most good”. advocates food therapy in the first, drug therapy in the second. In the treatment of disease, Chen Zhi pointed out: do not use “do not know the taste of the formula” and “wolf and tiger medicine”, and not to attack too much, to the point of distress. He said in the book of “old age and family book – preface” that “the disease of the elderly, careful in vomiting and dysentery, it is especially appropriate to use food to cure the …… is good at treating disease, as good as careful disease; good at treating medicine, as good at treating food”. However, in the process of treatment and medication, whether it is doctors or patients, often feel that more medication to see results. The performance of some patients will take several drugs at the same time. The author once met such a patient, almost 70 years old, suffering from diabetes, hypertension, these common diseases of the elderly, he ate every day there are more than 20 kinds of drugs, but thanks to his good memory. He proudly said: when to take what medicine, I know very well, will not be wrong. When I saw the medication list, I couldn’t help but wonder if it was really necessary for the patient to take so many medications. In fact, I looked at the patient’s list of medications, except for those necessary to treat hypertension and diabetes, many others are vitamins, calcium supplements, iron supplements, antibiotics, and various supplements bought by children, etc. Are all these drugs necessary for patients? Obviously not. The ingredients of various vitamins, calcium and iron supplements are all contained in natural foods, and it is generally possible to meet one’s needs for these nutrients through a normal diet. In Chinese medicine, there is the theory of “medicine and food are of the same origin” since ancient times. Improving diet and nutrition and making targeted adjustments can eliminate many of the hidden dangers of disease occurrence and development, thus eliminating disease. The former is more acceptable to people and has fewer side effects than the former through drugs.