Spleen polypeptide can mainly enhance the immune ability of the body and improve the speed of disease cure. Therefore, spleen peptide is usually used for primary or secondary cellular immune deficiency diseases, such as eczema and thrombocytopenia, as well as multiple infection syndrome. At the same time, it can also be used to treat respiratory tract and lung infections in clinic. It also has a certain auxiliary treatment effect on malignant tumors such as lymphoma caused by leukemia or aplastic anemia, and can also enhance the physical recovery of tumor patients after operation.