Objective,2,To investigate the correlation between overweight/obesity and traditional Chinese medicine （TCM） constitution， to find TCM constitution factors that may affect overweight/obesity， and to provide a basis for clinical prevention and control of overweight/obesity based on a cross-sectional survey study.,Methods,2,The clients of the physical examination center of Yueyang Hospital of Integrative Traditional Chinese and Western Medicine affiliated to Shanghai University of Traditional Chinese Medicine were selected as the subjects of the survey， and data on general demographic characteristics such as gender， age， marital status， and place of origin were collected. Digital ultrasonic electronic body scales were used to measure height and body mass， and body mass index （BMI） was calculated. The type of TCM constitution was evaluated with the TCM constitution identification software. Logistic regression model was used to analyze the correlation between overweight/obesity and general demographic data and TCM constitution.,Results,2,①Totally 761 subjects were included， among which 303 cases （BMI≥24） were categorized as overweight/obesity group， and 458 cases （18.5≤BMI,<,24） were categorized as normal weight group. There was significant difference in gender distribution between the two groups （,P,<,0.05）. ②Participants in both groups often possessed two or more constitutional types， and seldom had just one type. Compared with the normal weight group， the overweight/obesity group had less yang deficiency constitution and blood stasis constitution， but more phlegm dampness constitution and damp heat constitution， and the differences were statistically significant （,P,<,0.05）. In the male subgroup， there were significant differences in the prevalence of yang deficiency constitution， phlegm dampness constitution and special endowment constitution between the two groups （,P,<,0.05）； In the female subgroup， there were significant differences in the prevalence of yang deficiency constitution and phlegm dampness constitution between the two groups （,P,<,0.05）. ③Logistic regression analysis adjusted for the gender and 9 TCM constitutions that confounded each others showed that overweight/obesity was correlated with gender ［,OR,=3.39，95%,CI,（2.41～4.76），,P,<,0.001］， yang deficiency constitution ［,OR,=0.46，95%,CI,（0.27～0.79），,P,=0.004］， phlegm dampness constitution inclination ［,OR,=2.37，95%,CI,（1.20～4.69），,P,=0.013］， and phlegm dampness constitution ［,OR,=3.35，95%,CI,（2.01～5.57），,P,<,0.001］.,Conclusion,2,Overweight/obesity may be correlated with a variety of TCM constitution types， with the greatest correlation with phlegm-damp constitution and yang-deficiency constitution.