Objective To estimate the daily intake of DEHP among workers in flavoring factories. Methods 71 workers in two flavoring manufacturers, 27 administrators in those factories and 31 laboratory technicians in a research institute were recruited and assigned to exposure group, control group 1 and control group 2 respectively. Their urinary DEHP metabolites, mono(2-ethylhexyl) phthalate(MEHP), mono-(2-ethyl-5-hydroxyhexyl) phthalate(MEHHP), mono-(2-ethyl-5-oxohexyl) phthalate(MEOHP), were detected by isotope dilution-ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS). The urinary metabolites concentrations were converted into DEHP intake levels using two pharmacokinetic models: the urine creatinine-excretion(UCE) one and the urine volume(UV) one. Results No significant differences were found among the three groups. Based on the urinary concentrations of Σ3MEHP, we got a median daily DEHP intake of 3.22 or 1.85 μg/kg body-weight/day applying the UV or UCE models respectively. Depending on the UV model, three subjects(2.34%) exceeded the RfD value given by US EPA and the P50 of estimate daily DEHP intakes accounted for 16.10% of the RfD value. No subjects exceeded the limitation depending on the UCE model. Conclusion The workers in flavoring factories were not supposed to be the high DEHP exposure ones and their exposure level remained at a low risk. Objective To estimate the daily intake of DEHP among workers in flavoring factories. Methods 71 ​​workers in two flavoring manufacturers, 27 administrators in those factories and 31 laboratory technicians in a research institute were recruited and assigned to exposure group, control group 1 and control group 2 respectively. Their urinary DEHP metabolites, mono (2-ethylhexyl) phthalate (MEHP), mono- (2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono- were detected by isotope dilution-ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS / MS). The urinary metabolites concentrations were converted into DEHP intake levels using two pharmacokinetic models: the urine creature-excretion (UCE) one and the urine volume (UV) one. Results No significant differences were found among the three groups. Based on the urinary concentrations of Σ3MEHP, we got a median daily DEHP intake of 3.22 or 1.85 μg / kg body-weight / day applying the UV or UCE models r espectively. Based on the UV model, three subjects (2.34%) exceeded the RfD value given by the US EPA and the P50 of estimate daily DEHP intakes accounted for 16.10% of the RfD value. Conclusion The workers in flavoring factories were not supposed to be the high DEHP exposure ones and their exposure level remained at a low risk.