Abstract: Subclinical hypothyroidism is common in children,but its clinical significance is widely debated.The pathogenesis is not very clear and etiology appears to be multifactorial,such as autoimmune thyroiditis,obesity,antiepileptic drugs and so on.Currently there is no broad consensus on the management of children with subclinical hypothyroidism.In this review,the available evidences regarding to investigation,risk factors,trreatments and outcomes for this disease are summarized.