Children due to immunodeficiency caused by recurrent bronchitis take splenic aminopeptide will have a certain auxiliary therapeutic effect, but need to follow the doctor’s instructions to use. Splenin peptide belongs to the immunomodulatory drugs, can promote the body’s immune balance, the commonly used dosage form has oral lyophilized powder, oral solution and so on. Splenopeptide oral lyophilized powder can be used for the treatment of immunodeficiency, cellular immune deficiency, autoimmune dysfunction diseases (such as recurrent respiratory tract infections, asthma, bronchitis, pneumonia, psoriasis, severe herpes zoster), and so on. Therefore, children with recurrent bronchitis and low immune function, taking this product has a certain auxiliary therapeutic effect. However, the adverse reactions and contraindications of this product have not been clarified, the use of this product should be reasonable under the guidance of a doctor.