Summarize the nursing experience of 9 children with X-linked agammaglobulinemia who were first treated with subcutaneous infusion of human immunoglobulin in mainland China. Nursing points: there is no precedent in mainland China for high-dose subcutaneous infusion of human immunoglobulin, therefore, it is necessary to make sufficient preparation and care before infusion, pay attention to the observation and care of drug infusion, provide guidance on home medication, pay attention to psychological care, and ensure that patients smoothly transition from hospital medication to home medication. All 9 patients successfully completed subcutaneous injection of human immunoglobulin treatment, ensure smooth transition of patients from hospital medication to home medication. and no serious adverse reactions occurred, resulting in good results.