Nonalcoholic fatty liver disease(NAFLD)is the most common liver disease among children in China,and it is closely related to obesity,diabetes,metabolic syndrome and other diseases,which seriously affects the growth and health of children and adolescents.Therefore,in recent years,children's NAFLD has received more and more attention.This paper summarizes the epidemiology,pathogenesis,diagnosis and treatment status of children's NAFLD,in order to improve the understanding of the disease and do a good job in the prevention and treatment of children's NAFLD.