Objective To investigate the clinical characteristics of primary Sj?gren's syndrome (pSS) complicating atherosclerosis(AS).Methods The clinical data of the patients with PSS in the rheumatology department of Yueyang Hospital of Integrated Traditional Chinese and Western Medicine of Shanghai Univer-sity of Traditional Chinese Medicine from January 2019 to January 2022 were retrospectively analyzed.The pa-tients were divided into the complication group (n=108) and non-complicating group (n=106) according to whether or not complicating AS.The differences in the general data,laboratory indicators and carotid intima-media thickness (IMT) were compared between the two groups.The risk factors were analyzed.Results Compared with the non-complicating group,the age in the complicating group was bigger[66.00(61.25,69.00)years old vs. 59.00(50.75,65.25)years old],the disease course was longer[128.00(108.25,141.75)months vs. 94.00 (74.75,112.25)months],the levels of ESR,monocyte count,interleukin-6 (IL-6),interleukin-2 receptor (IL-2R),total cholesterol and low density lipoprotein-cholesterol were higher[27.00(14.10,48.00)mm/h vs. 22.00(12.00,36.50)mm/h;0.40(0.30,0.50)×109/L vs. 0.30(0.30,0.50)×109/L;3.56(2.17,5.95)pg/mL vs. 2.62(1.00,5.15)pg/mL;519.00(403.00,662.00)U/mL vs. 441.00(348.00,592.00)U/mL;(4.86±1.17)mmol/L vs. (4.55±1.10)mmol/L;(3.07±0.80)mmol/L vs. (2.82±0.78)mmol/L],IMT was larger[left side:0.80(0.80,0.90)mm vs. 0.80(0.78,0.80)mm;right side:0.80(0.80,0.90)mm vs. 0.80 (0.80,0.80)mm],and the differences were statistically significant (P<0.05).The multivariate logistic re-gression analysis results showed that the long disease course (OR=1.080) and ERS level increase (OR=1.021) were the independent risk factors of AS occurrence in pSS (P<0.05).Conclusion There are differ-ences in the serologic indicators between the pSS patients with complicating AS and the pSS patients without complicating AS,and the disease course and ESR level have the influence on it.