Abstract: Objective To describe epidemiological and aggregative characteristics of metabolic syndrome(MS) among enterprise workers in Hangzhou city.Methods According to the definition of Chinese Diabetes Society(CDS) for MS in 2004, 1 972 employees from 12 enterprises in Xiacheng, Xihu and Gongshu district of Hangzhou were investigated.Results The prevalence of MS in the workers was 5.17%, with a standardized rate of 6.77%.The prevalence of MS for male(6.92%) was significantly higher than that for female(2.46%).The age-specific pnevalences of MS were 11.45% and 15.31% for male workers aged 40-44 and ≥45 years, which were obviously higher than those for female workers(3.81%, 5.56%).With the increment age, the overall and gender specific prevalences of MS, adiposity, hypertension, hyperglycaemia, and hyperlipemia increased remarkably.In addition, compared with the male workers aged 35-39 years, the prevalence of male workers aged ≥40 years increased by 6.75%, similarily, the prevalencen of MS increased by 8.74% for female workers aged ≥50 years compared to the female workers aged 45-49 years.Conclusion The preralence of MS among enterprise workers in Hangzhou is high, with the significantly higher prevalence in male workers than in female workers.With the increment of age, the prevalences of MS and its components including adiposity, hypertension, hyperglycaemia, and hyperlipemia increase significantly, especially for the males older than 40 years and for the females older than 50 years.