Abstract: Lung is a delicate organ, and the postnatal growth relies on spleen. The relationship between lung and spleen is like mother and child, with gas and blood exchange. The children are weak in lung and spleen after birth, so they are likely to have the diseases related to lung and spleen. Their normal functions and the pathophysiological changes of them significantly affect the outcome and prognosis of the diseases in children. Professor Zhang Shiqing is a famous TCM physician in pediatric diseases, who is good at the diagnosis and treatment of diseases in lung and spleen. These diseases are characterized by much phlegm and dampness and being prone to coldness and heat. Prof. Zhang uses modified Erchen decoction to regulate lung and spleen. Erchen decoction is a basic prescription in the treatment of lung and spleen diseases, and is widely used in clinic.

Key words: Lung and Spleen, Erchen decoction, Zhang Shiqing, Child