OBJECTIVE: To investigate the prevalence of metabolic syndrome(MetS) and its related influencing factors among male workers in several industries in Guangzhou City.METHODS: A total of 2 987 male workers were selected by convenience sampling method and the occupational health physical exam data from 2012 to 2015 was collected.The MetS was diagnosed according to the diagnostic criteria proposed by the Chinese Medical Association Diabetes Association.The analysis of correlation factors was conducted by the generalized estimating equation method.RESULTS: The diastolic blood pressure of subjects increased year by year(P<0.01) and high-density lipoprotein cholesterol(HDL-C) decreased year by year(P<0.01) from 2012 to 2015,but the changes of body mass index,systolic blood pressure and levels of fasting plasma glucose,triglyceride didn't increase or decrease over time.The prevalence of high blood pressure,high glycemia,high TG,low HDL-C and MetS were found to increase year by year(P<0.01) from 2012 to 2015.The generalized estimating equation analysis results showed service length,family history(hypertension and/or diabetes),regular alcohol consumption,frequent smoking,oily diet and meat-rich diet were the risk factors of MetS(P<0.05) after adjusting the confounding factors of age.CONCLUSION: The incidence of MetS in male workers in Guangzhou City is increasing year by year.The service lengh,family history(hypertension and/or diabetes),regular alcohol consumption,regular smoking,oily diet and meat-rich diet are associated with the prevalence of MetS in this population.