Abstract: Objective To develop blood pressure（BP）references by age and height simultaneously for Chinese children aged 3-17years（updating references）. Methods Based on a pooled sample of 106 123 children,BP values were obtained with certified mercury sphygmomanometers by trained examiners. Systolic BP（SBP）and diastolic BP（DBP）were defined by Korotkoff sounds phase 1and phase 5,respectively. The sex-,age-and height-specific BP percentiles(P₅₀,P₉₀,P₉₅ and P₉₉)were calculated by the generalized additive model for location scale and shape（GAMLSS）. Data on BP were available for a total of 43 476 children aged 6to 17years（male:51.2%）from a separate survey and the difference in the discrimination ability of hypertension between updating references and BP references in 2010 was studied. Results The cut-off values(P₅₀,P₉₀,P₉₅ and P₉₉)of BP increased with height and age.Compared to BP references in 2010,SBP level of the 95 th percentiles of updating references at the height of5 th percentiles was lower（lowered by 3-7mm Hg in male and 0-6mm Hg in female）;SBP level of the 95 th percentiles of updating references at the height of 95 th percentiles was higher（increased by 2-6mm Hg in male and 0-4mm Hg in female）;DBP level of the 95 th percentiles of updating references at the height of 5th percentiles from 3to 13 years was lower;DBP level of the 95 th percentiles of updating references at the height of 95 th percentiles was similar.Among hypertensive children defined by BP references in 2010,90.1%remained hypertensive according to updating references. Conclusion The BP references by age and height are useful for identifying hypertensive children.