Diabetes mellitus in Chinese medicine belongs to the category of “thirst” and other diseases, which need to be diagnosed and treated. Chinese medicine believes that the disease of thirst is caused by the deficiency of innate endowment (innate constitution and poor function) or acquired dietary indiscretion, overwork, emotional disorders, kidney yin deficiency and other reasons, such as yin deficiency and internal heat, dryness and heat in favor of the prevalence of. The disease is characterized by dryness-heat as the symptom and yin-deficiency as the root cause. The interaction between the two leads to symptoms such as excessive drinking, excessive eating, excessive urination and emaciation. Chinese medicine needs to recognize and treat this disease, which is divided into upper, middle and lower elimination. The disease of Upper Consumption is located in the lungs, where lung heat injures the body’s fluid, manifesting as excessive drinking; the disease of Middle Consumption is located in the stomach, where stomach fire blazes, manifesting as excessive eating; and the disease of Lower Consumption is located in the kidneys, where kidney yin is deficient, manifesting as excessive urination. The principle of treatment is to clear heat and moisten dryness, clear stomach fire, nourish yin and tonify the kidney, using the formula of the Thirst Elimination Formula, Jade Maiden Decoction, Six-flavored Digoxigenin Pill and so on, which need to be replaced or added or subtracted according to the specific condition under the identification of the TCM practitioner. If there is any discomfort and medication is needed, please consult a regular hospital or medical institution in time and use the medication under the doctor’s guidance.