A method for the determination of 9 organophosphate flame retardants（OPFRs） in water by liquid-liquid extraction（LLE） followed by gas chromatography with flame photometry detection was developed.The main analytical conditions,such as water sample preparation and instrument analysis method,were optimized.Liquid-liquid extraction was selected using methylene chloride as extraction solvent,and organic phosphorus Rtx-OPPesticides 2 special column was chosen as analytical column.Under the optimal conditions,a completed base line separation of 9 OPFRs was obtained within 15 min.9 OPFRs in the concentration range of 1.0-500 ng/mL showed good linear relationship（r2≥0.998）.The method detection limits（MDLs） ranged from 1.0 ng/L to 2.0 ng/L.At spiked concentrations of 5,100, 300 ng/L,the recoveries of 9 OPFRs were in range of 75.9%-111% with relative standard deviations（RSD） of 3.3%-15%.The method was further applied in the determination of OPFRs in real lake water samples with 9 OPFRs total concentrations of 408-1 532 ng/L.The analytical result showed that the lake water was contaminated by OPFRs.