45 surface sediment samples (at the top 0~5 cm layer) were collected from the Baiyangdian Lake. The contents of 22 PBB congeners, 8 PBDE congeners, and 28 PCB congeners in sediments were measured using Varian CP3800/300 GC-MS/MS technique. The measured level shows that PCBs have the highest entrations in the sediment samples among the three PHAH subfamilies, with Geometric Mean 20.57 ng·g^-1·dw. B28, 52, 66, 138, 156 and 170 are the most predominant PCB congeners. The levels of PBBs and PBDEs are lower than those of PCBs in the sediment samples, with a concentration of 0.47 and 1.78 ng·g^-1 ·dw, respectively. PBDE28 and 47 are the most predominant PBDE congeners, with their concentration accounting for 16 % and 21 % of the total PBDEs concentration observed in the sample, respectively. The PHAHs levels monitored in the present study were compared to those reported recently for districts located in other countries. The concentrations of PHAHs in the sediment samples were in the same order of magnitude of those reported on background levels in remote lakes sediment in these European and American countries, which shows toxic biological effects on aquatic biota and potential risk are negligible due to PHAHs contamination in sediments.