Novel IL-porous carbons modified glassy carbon electrode(GCE) was prepared for the detection of tertiary butylhydroquinone(TBHQ).The results of electrochemical impedance spectroscopy showed that the electron transfer resistance(Rct) of the IL-porous carbon/GCE was much smaller than that of the bare GCE.For the detection of 8.00 μg/mL TBHQ,the oxidation peak current at the IL-porous carbon/GCE was 41.93 μA,which was about 5.5 times of that at the bare GCE.This indicated that IL-porous carbon could increase the conductivity of the electrode,improve the electron transfer and the detection sensitivity.Therefore,the presence of IL-porous carbon on the electrode surface could enhance the detection sensitivity.Depending on the amperometrici-time curve,the calibration curve for TBHQ determination demonstrated a linear response in the range of 1.00-120.00 μg/mL with a detection a limit of 0.16 μg/mL．