Yam powder is sweet and flat in taste, and belongs to spleen, lung and kidney meridians, which has the effects of tonifying spleen and stomach and benefiting lung and kidney. It is a tonic for triple energizer, with the upper energizer replenishing the lung, the middle energizer replenishing the spleen and stomach, and the lower energizer tonifying the kidney. Clinically, it is often used for spleen and stomach weakness, anorexia, chronic diarrhea in loose stool, malnutrition in children, and increased leucorrhea due to spleen deficiency. It can also be used for chronic cough due to lung deficiency and phlegm cough due to fatigue. Used for asthma and chronic cough due to deficiency of lung and kidney. At the same time, it can be used for nocturnal emission, frequent urination and so on. Yam powder can also be used for diabetes due to deficiency of both qi and yin. Yam powder is also a good food therapy.