Ambulatory blood pressure monitoring (ABPM), which can reflect the 24h mean blood pressure, precisely characterize changes in blood pressure throughout daily activities and circadian rhythm, has been found to be superior to traditional blood pressure monitoring. ABPM is in more widespread use in recognition of children's white coat hypertension and masked hypertension, predicting target-organ damage, assessing the efficacy of antihypertentive drug treatment and distinguishing primary hypertension from secondary hypertension.The article summarizes the clinical applications of ABPM in pediatrics.