Aim To investigate the correlation between the 24 hours ambulatory systolic blood pressure (SBP) and brachial-ankle pulse wave velocity (baPWV) in the elderly. Methods The first health examination for in-service and retired staff in Kailuan Group Company was performed from 2006 to 2007, with the second, third health examination from 2008 to 9,0 to 2011 respectively. At the third health examination, a cluster random sample of 2814 cases ≥60 years old and retired employees was selected, and ambulatory blood pressure, baPWV, etc. were examined. 2464 cases met the inclusion criteria, and 1004 cases had complete data. Multivariate linear regression analysis was used to analyze the correlation between 24hSBP, day SBP, night SBP and baPWV. Results (1)Research subjects were divided into three groups according to 24hSBP, day SBP and night SBP tertiles. baPWV was increased with the increase of 24hSBP, day SBP and night SBP (all P＜0.001). (2)Multivariable linear regression analysis showed that when 24hSBP, day SBP, night SBP increased 1 standard deviation, BaPWV was increased by 81.5,3.8,1.30 cm/s, after adjustment for confounding factors. In addition, the diagnosis room SBP also showed a linear positive correlation with baPWV, and the regression coefficient of diagnosis room SBP was larger than that of ambulatory SBP. Conclusion 24hSBP, day SBP and night SBP are positively correlated with baPWV, but the correlation was weaker than that of diagnosis room SBP.