Infant sepsis is a serious disease because infants are very young, their resistance is still poor, and their organs are not fully functional, so once they are infected with bacteria their condition can change rapidly and they are prone to organ failure. Most infants can be cured with timely anti-infection treatment. However, for some infants, there may be serious complications such as infectious shock, DIC tendency, or even multiple organ failure, etc. Such children are in critical condition and need to be admitted to the intensive care unit. In addition to anti-infective treatment, respiratory and circulatory maintenance and supportive therapy are also very important.