English summary: In a cross-sectional survey among 2783 laborers working in 5 vocational village groups in 3 provinces of Thai Binh, Nam Dinh and Hai Phong, it is found that Pignet index of those subjects is quite good (healthy people took 66.4%), males are healthier than females, those working in salt production and sea fishing are healthier than other occupations / Overweight / obese rate is 17%, higher in salt producers (20.0%) and fishermen (24.0%), and lowest in tobacco planters (16.2%) with p<0.05; CED rate is 27.4%, highest in weavers and dyers (35.3%).