Abstract:In 2022, Queensland clinical guidelines issued clinical guidelines for term small for gestational age newborn baby, which were updated and revised in terms of definition and classification, growth and health, evaluation and diagnosis, supportive nursing, discharge follow-up and so on. This paper mainly interprets the updated contents of the 2022 version of the guidelines in order to better guide obstetricians and pediatrician to manage less than gestational age newborns and provide reference for reducing perinatal mortality under 5 years old.