Chinese medicine treatment of spleen and stomach disease focuses on balancing the spleen and stomach in the middle jiao, connected by the membrane, spleen qi should rise, stomach qi should descend, spleen likes to be rigid and dry, stomach likes to be soft and moist, the opposite is true. In accordance with Wu Jutong’s principle of “the middle jiao is like a balance, not flat and unsettling”, attention should be paid to cold and temperature, lift and adjust, deficiency and reality in the same way. Stomach Qi is also known as Spleen and Stomach Qi, and Stomach Qi is the essence of the latter day. Because the five viscera and six internal organs are endowed with gas in the stomach, stomach gas can nourish the gas of the five organs, and among the gas of the five organs, kidney gas is most closely related to stomach gas. The kidney is the innate qi, the spleen and stomach are the latter qi, the kidney qi is the root of the stomach qi, and the stomach qi nourishes the kidney qi. Insufficient innate qi can also be nourished by the acquired qi. A healthy person has sufficient stomach qi, which is manifested by good appetite and full of energy. If a person eats and drinks as usual during illness, it indicates that the stomach qi has not been injured; if the appetite gradually improves and the amount of food increases, the stomach qi is restored. If you are seriously ill for a long time and see a loss of appetite, a decrease in the amount of food, or even do not think about eating, it is a manifestation of the failure of the stomach qi, and the prognosis is not good, as it is said that those who get the grain will prosper, and those who lose the grain will die. In the treatment of disease, not only should the stomach Qi not be attacked, but also should always take care of the stomach Qi. The purpose of using attacking and diarrhea drugs is to remove the evil, such as attacking and diarrhea without real evidence, or even if there is real evidence and attacking and diarrhea too much, will attack the spleen and stomach, damage the stomach qi, so the prescriptions that damage the stomach qi, unless necessary, should not be used more. In addition, in the treatment of various diseases of the spleen and stomach, whether attacking or diarrhea, if the herbs are to be taken for a longer period of time, it is necessary to add products that harmonize the stomach in order to protect the stomach qi. Regulating the rise and fall of qi is the basic form of physiological activity of the body, and the spleen and stomach are the hub of the rise and fall of qi, so regulating the rise and fall is also the principle of treating spleen and stomach diseases. Ye Tianshi pointed out that “the spleen should rise to be healthy, and the stomach should descend to be harmonious”. Spleen and stomach disorders can be manifested in three forms, namely, failure to ascend and descend, and disorder to ascend and descend. The spleen and stomach are weak, the spleen qi should rise but the ascending and transporting is weak, the stomach qi should descend but and descending is incompetent. This kind of disease rest, treatment should take the method of tonic, to help the spleen to rise and stomach down and make up for the lifting and lowering of the deficiency. For example, if the spleen is deficient in biochemical source of qi and blood, the spleen should be tonified and the qi should be benefited to help the biochemical process of qi and blood; for constipation where the stomach is deficient in yin and the stomach is not moistened and lowered, the yin should be nourished and moistened to restore its smooth descending nature. The opposite of ascending and descending refers to spleen qi sinking instead of ascending, and stomach qi going up instead of descending. This type of disorder should be corrected by adding products that raise the sink or lower the rebellion on the basis of tonification, such as Sheng Ma and Chai Hu for tonifying Zhong Yi Qi Tang, and Xuan Yi Dai Ochre for Xuan Yi Hua and Dai Ochre. Dysfunctional ascending and descending refers to a patient who has both a loss of healthy movement of the spleen or a lack of ascension of the clear yang, and a loss of harmony of the stomach and descending; or a disorder of ascending and descending, with blockage of the qi flow. The treatment of such disorders should be both up and down, strengthening the spleen should be ascending, and harmonizing the stomach should be descending, which is the common clinical method. For complex cases, it is necessary to understand the changes and master the treatment principles of lowering in ascending and ascending in descending. The spleen is the yin of the organs, and the stomach is the yang of the bowels, which are relatively divided according to the different nature of the organs and bowels. However, in terms of the nature of their susceptibility to disease, moisture is a yin evil that can easily injure the spleen yang, and dryness is a yang evil that can easily injure the stomach yin. Therefore, in terms of treatment, warming the spleen and nourishing the stomach, drying dampness and clearing heat all belong to the category of regulating yin and yang. The treatment of spleen and stomach diseases is also based on the principle of restoring the relative balance of yin and yang by supplementing their deficiencies and dipping their excesses. In the treatment of spleen and stomach diseases, Li Dongyuan emphasized the promotion of spleen-yang and Ye Tianshi emphasized the nourishment of stomach-yin, while the treatment principles of supporting spleen-yang and nourishing stomach-yin are both directed at the strength and weakness of spleen-yin and stomach-yin and supplementing their deficiencies. Nourishing stomach yin can harmonize the yin and yang of the stomach, so that it can descend without reversing, and can overflow essence for the spleen to disperse essence and return to the lungs. The emphasis on supporting Spleen-Yang and nourishing Stomach-Yin does not exclude supplementing Spleen-Yin and benefiting Stomach-Qi, but because there are primary and secondary lesions of Spleen-Gastro-Yin-Yang deficiency, there should be some focus in the treatment. The spleen hates dampness and prefers dryness; dryness makes the spleen’s clear qi rise; the stomach hates dryness and prefers moistening; moistening makes the stomach’s turbid qi fall. Dampness is a yin evil, dryness is a yang evil and the theory, dry dampness and heat are for the spleen and stomach by the evil, diarrhea its surplus in order to get rid of the evil and the main rule of treatment. Drying dampness in the spleen is a treatment for dampness attacking the spleen and soil, or for spleen deficiency and loss of transportation, and for water and dampness growing inside. Clearing stomach heat is the rule of treatment for the actual stomach, including clearing the fire heat of the stomach, intestines and liver meridians. The spleen and the stomach are connected by the membrane, the spleen qi should ascend, the stomach qi should descend, the spleen likes to be rigid and dry, the stomach likes to be soft and moist, the opposite is true. Therefore, the treatment of spleen and stomach diseases should be based on Wu Jutong’s principle of “the middle jiao is like a balance, not flat and unsettling”, paying attention to cold and temperature, and adjusting both up and down, deficiency and reality. Cold and heat refer to the nature of the medicine, although there is the saying that “the spleen is healthy if it is warm, and the stomach is safe if it is cool”, but the treatment of the spleen should not be too warm and too hot, if the heat is too much, it will damage the spleen yin; the treatment of the stomach should not be too cold and too cold, if the cold is too much, it will damage the stomach yang, so the cold and temperature should be appropriate, and even bitter cold and pungent warm can be matched. For spleen and stomach diseases with imbalance of ascending and descending, and Qi blockage, it is advisable to regulate both ascending and descending. The treatment of the spleen should be ascending, and the stomach should be descending, and for complex cases, must also master ascending in descending, descending in ascending, in order to make the ascending and descending not resting spleen healthy stomach and. In the former case, for example, the treatment of hypogastric prolapse is treated with Tonic Central Beneficial Qi Tang plus Citrus aurantium; in the latter case, the treatment of stubborn vomiting is treated with Xuanwei Dianchu Tang plus Ge Gen. There are both deficiency and actual evidence of spleen and stomach diseases, as well as mixed evidence of deficiency and actuality, so the use of tonic and diarrheal methods must be appropriate. If there is a deficiency in the spleen and stomach, it is necessary to use the appropriate method of tonic and diarrhea. However, attention should be paid to tonic but not stagnant, diarrhea but not to cut down, to supplement Yang not to damage Yin, supplement Yin not to hinder Yang.