The application and treatment of medicinal food, like drug therapy, also has its basic laws. These basic laws are accumulated from long-term experience in the process of medicinal food health treatment, from these practical experience summarized in the law, the formation of food therapy law. But in the use of these specific laws should be appropriate for the time, place and person, can not be rigidly applied, otherwise it will be counterproductive. The following will be commonly used in the law of food therapy to be introduced: (1) dialectic body treatment, food gas must be in conjunction: this is the most basic law of food therapy in China. Chinese medicine to all kinds of food are regarded as drugs, each food has a taste, attributed to the meridian and different functions. Therefore, in the selection of food, the first thing to understand the patient's evidence or normal people's physical attributes, in order to determine the application of the food, targeted to treat the disease or adjust the physical, in order to achieve the purpose of curing the disease and maintaining human health. Chinese medicine believes that normal people "Yin Ping Yang secret" is the harmony of qi and blood yin and yang, eating and living are normal. Some people do not have obvious signs of disease, but from certain manifestations, there are signs of imbalance between yin and yang. Physique is also clearly the existence of cold body, hot body difference. Physical heat, it is advisable to eat cool foods, such as green beans, spinach, cucumber, watermelon, lotus seeds, fungus, duck, river fish, turtle, etc., should eat less dry and warm things. If your body is cold, you should eat warm foods, such as green onion, leek, ginger, garlic, longan, mango, pumpkin, beef, eel, sea fish, chicken, quail and other foods, and you should eat less cold foods.

(2) the implementation of the "five flavors of the same tone, the nature of the taste of the same" principle: the five flavors of Chinese medicine is the role of drugs and food abstract concepts, in general, "pungent dispersal, acid collection, sweet slow, bitter, salty, soft". The same flavor has similar effects, and the different ones have different effects. Five flavors in tune with each other, refers to the use of food must pay attention to the different flavors of food between the mutual antagonism and coordination of the role, such as turtle fish and amaranth, chicken and eel, honey and green onions are generally different, is because of its sex and flavor is not coordinated for this reason. The other meaning of "five flavors are adjusted" for the different flavors of food, in the application, the proportion between each other should be appropriate, such as "grain, meat, fruit, vegetables" a variety of different types of food, are to be served with, so that the dietary composition of a wide range of ingredients and as perfect as possible. Sexual flavor is winning, refers to the use of food in the understanding of the body's balance of yin and yang imbalance of the status quo, to target the "sexual flavor is winning" food to correct its yin and yang bias and bias decline. "The five flavors are in harmony, the sex and taste of each other" is the food therapy must follow the law, is the method of treatment, that is, the specific implementation of the "cold of the warm, hot of the cold, the deficiency of the complementary, solid of the diarrhea" and other therapeutic laws of the general law.

(3) food is very important to have a section, food do not want to be mixed, the stomach like to supplement: in the dietary therapy, the amount and quality of food can not be randomly increased or decreased. "Food and drink in moderation, the five flavors and harmony is consistently emphasized in the "Neijing". In the process of food therapy, first of all, we should find out the patient's situation, make a judgment, and then formulate a targeted food treatment program, with food must be reasonable, appropriate quality, prescribed medicinal dietary formula and food therapy formula, should be carefully implemented. In the implementation of the patient's response to food therapy should be observed. The food used by the patient must be comfortable and no adverse reactions, if there is abdominal distension, abdominal pain, nausea, vomiting and other discomforts, we must find out the cause and adjust the food until the patient feels comfortable and no adverse reactions after eating, and then it is feasible. "Only when the patient feels comfortable and has no adverse reaction after eating will it be feasible for the patient to digest and absorb the food and play a complementary role in the human body. Also to prevent indiscriminate fasting or fasting too long, otherwise it will bring adverse consequences to the patient.