Objective To compare the blood lipid levels of different brachial-ankle pulse wave velocity (baPWV) in young and middle-aged people with normal blood pressure and to explore the related factors affecting baPWV.Methods From January 2014 to December 2017,the clinical data of one thousand two hundred and sixty-eight middle-aged and young people with normal blood pressure who underwent physical examination in Dongying People's Hospital were retrospectively analyzed.Using baPWV＜ 1 400 cm/s as the standard of normal arterial stiffness,the patients were divided into normal arterial stiffness group (normal group,1 128 cases),abnormal arterial stiffness group (abnormal group,baPWV ≥ 1 400 cm/s,140 cases).The blood lipid indexes of the two groups were analyzed and compared.Logistic regression analysis was used for multivariate analysis and linear correlation analysis was used for linear correlation analysis.Pearson correlation analysis was used.Results Compared with the normal group,TC ((4.99 ± 1.10) mmol/L vs.(4.48 ± 1.03) mmoL/L,t =5.830),TG ((1.62 ± 0.27) mmol/L vs.(1.49 ± 0.23) mmol/L,t=5.102),LDL-C[(3.25±0.23) mmol/L vs.(3.11±0.16) mmol/L,t =4.712),Apo B((0.96 ±0.07) g/L vs.(0.87±0.08) g/L,t =4.297)in abnormal group all increased,and HDL-C((1.15±0.09) mmol/L vs.(1.27±0.07) mmol/L,t =4.712) decreased,and the differences were statistically significant (P＜0.05).Smoking,high FPG,high LDL-C,high Apo B,low HDL-C were the independent factors affecting baPWV abnormality (P＜ 0.05).TC,TG,LDL-C,Apo B and baPWV in abnormal group were positively correlated(P＜0.05),and HDL-C and baPWV were negatively correlated(P＜0.05).There was a linear regression relationship between LDL-C,Apo B and baPWV (P＜0.05).Conclusion The increase of LDL-C and Apo B are closely related to early arterial disease in the low-risk populations of normotensive young and middle-aged people,even the risk of blood lipid may already exist within the normal range.