The upper elimination, middle elimination and lower elimination are the identification and typing of diabetes mellitus, i.e., consuming thirst in Chinese medicine, and the main difference is that the disease evidence is different, so the therapeutic drugs are different. The “three eliminations” were clearly proposed by the Ming Dynasty physician Wang Kentang in “The Essentials of Evidence”, which helps TCM practitioners to differentiate and treat diabetes mellitus. Upper elimination in the lungs, for the lung heat and fluid injury (lungs in the heat evil, continuous depletion of human body fluid) caused by the main manifestations of excessive drinking, dry mouth and tongue, accompanied by frequent urination, urination, at this time the treatment is appropriate to clear the heat and moisten the lungs (to remove the heat evil to moisturize the lungs), the generation of fluid to quench thirst (promote the generation of fluid to alleviate thirst), commonly used traditional Chinese medicine, such as raw ground, maitou, goji berries, XuanShen and so on. Middle elimination in the stomach, for the stomach heat blazing caused, the main performance is to eat more easily hungry, but the body is thin, accompanied by thirst and urine, stool dryness, the treatment should be clearing the stomach and diarrhea (remove stomach fire), nourishing yin to increase fluid (increase the body of water), you can use the Jade Maiden Decoction with subtractions. Lower elimination in the kidneys, caused by deficiency of kidney yin, the main manifestations are frequent urination and excessive urination, cloudy urine, accompanied by lumbar and knee soreness and weakness (lumbar and knee soreness and weakness), dizziness and tinnitus, fatigue (mental exhaustion, physical weakness), dry mouth and lips, etc., at this time the treatment is appropriate to nourish yin and tonify the kidneys, moistening the dryness and stopping the cough, can be used to add or subtract six flavors of the groundhuang pill. Diabetes mellitus in the active lowering of blood sugar, based on traditional Chinese medicine evidence-based treatment, help the control of the condition, the use of medication should follow the doctor’s instructions.