After analyzing the compatibility,the medicines,the usage and dosage in ancient and modern times of Maimendong decoction,we hold that the decoction is characterized by the refined composition and exquisite combination of the ingredients,sweet-cold nourishing the stomach,the active ingredients of the prescription possess the pharmacological effects of anti-fibrosis,improving lung function and respiratory hypersensitivity and promoting gastric emptying.Nowdays,the decoction has been applied in internal medicine,surgery,gynecology and pediatrics,involving respiratory and digestive systems,and it has gained remarkable clinical effects.