Abstract: Objective The objective of this study was to find out the epidemic characteristics of obesity among adults in urban communities．Methods The multi-stage sampling method，I.e．Cluster and stratification sampling combined with systematic sampling，was applied to conduct a household survey of residents in communities．The data of survey were recorded with database of Epi data，and analyzed statistically with analysis software of SAS．Results Among people above 20 years old in communities，the morbidity rate of obesity is 11.09％，and the standardized。Morbidity rate is 9.28％．There is no significant difference of morbidity between male and female．The morbidity rate of obesity increases with age and waist-hip-ratio，and increases significantly after stopping smoking and drinking．Obesity may remarkably accelerate the risk of chronic diseases，such as diabetes，hypertension，coronary heart disease，cerebrovascular disease，kidney disease and liver disease．Etc．Conclusion The morbidity rate of obesity is higher among adults in communities of cities．Obesity has a significant influence on other chronic diseases，which should be highly paid attention by relevant institutions，and active prevention and control measures should be taken