Abstract: In this paper, through detailedly analyzing the different medium samples collected in Tianjin typical coastal sea areas of Bohai Bay, at the same time, the pollution survey and distribution characteristics research of PBDEs is thoroughly discussed.The PBDEs content and the distribution of various homologues are analyzed by GC-MS.The results indicate that:(1) the PBDEs content is ranged from 43.8 ng/L to 93.3 ng/L in seawater, ranged from 15.9×10^-9 to 37.9×10^-9 (dry weight) in marine sediments and ranged from 6.19×10^-9 to 34.8×10^-9 (dry weight) in marine organisms.While the average concentration separately is 59.4 ng/L, 22.8×10^-9 (dry weight) and 19.4×10^-9 (dry weight).(2) Marine shellfish in three marine organisms have the strongest enrichment ability to PBDEs, while marine fish have the weakest enrichment ability to PBDEs.Low brominated homologues were detected as the main component in biological samples, while high brominated homologues (mainly BDE-209) were found in environmental media.(3) Compared with other coastal sea areas in China, the concentration of PBDE in seawater is slightly higher than that in the Pearl River estuary, and the concentration in sediments and organisms is at the same level.The study of PBDEs pollution in Tianjin offshore waters and similar persistent pollutants and the possible harm to human beings need to be further strengthened.