Feeding, dietotherapy and medicated diet are all TCM terms. There are both connections and differences between them, which are closely related to normal diet. Feeding is diet nutrition, which is to achieve the purpose of health care by regulating normal diet. Traditional Chinese medicine emphasizes the importance of diet and nutrition. "On Su Wen Zheng Wuchang" pointed out: "Eat fruits and vegetables, don't overdo it, it will hurt your health." Food should be comprehensive and nutrition balanced, which is the core content of scientific diet. The so-called "excess", one of which refers to excess nutrition. The proportion of animal protein and fat in the diet is too large, and there is too much sugar, which leads to the disaster of "civilized disease": obesity and the cardiovascular disease that follows it become the first major disease that leads to death. Another meaning of "overeating" is overeating. Su Wen On the Method of Dirty Qi pointed out: "Five grains are for nourishment, five fruits are for help, five animals are for benefit, five dishes are for filling, and the smell is combined to replenish essence." A complete diet must take cereals (including beans) as the staple food, livestock as the non-staple food, vegetables as the supplement and fruits as the supplement. It shows that the reasonable collocation of various foods is helpful to human health. This is consistent with the requirements of balanced diet and reasonable nutrition put forward by modern nutrition. The second essence of scientific diet is to choose and eat food reasonably according to its nutritional characteristics and taste function. Food hygiene is the third aspect of scientific diet. The close relationship between food hygiene and diseases can best be explained by "the disease enters from the mouth". Any delicate food, if contaminated, spoiled or eaten improperly, may become a deadly drug. A scientific diet also includes a reasonable diet system and good eating habits. "Eat well, drink well and live a regular life", which can be "/kloc-go away at the age of 0/00"; And "doing what you do and living without restraint" will inevitably lead to "half a hundred failures."