A high field asymmetrical waveform ion migration spectrometric(FAIMS) method was developed for the determination of benzene in water.The benzene standard spectra in different dispersion voltages(DV) were studied,and the second-order α2 and the fourth-order α4 coefficients of non-linear function for benzene identification were calculated to be -3.8×10-5 Td-2 and 5.1×10-8 Td-4,respectively.The optimum dispersion voltage for benzene identification was obtained to be 800 V by balancing the sensitivity and resolution.The detection limit of FAIMS for benzene in water,through the relationship between benzene signal intensity and different benzene concentrations(0.08-0.64 mg/L),was determined to be 0.89 μg/L,which was far superior to the national concentration limit(10 μg/L) for benzene in drinking water.This study provides a rapid and sensitive method for the detection of benzene in water.