A novel PTA-MMT and［BMIM］PF6 modified glassy carbon electrode（PTA-MMT-［BMIM］PF6/GCE） was prepared and successfully used for the determination of paraquat（PQ）.The modified film was characterized by infared（IR） spectrometry.The charge transfer resistance of PQ on PTA-MMT-［BMIM］PF6/GCE was the lowest by comparing the nyquist plots of the electrode before and after modification.The cyclic voltammetric behavior of PQ on modified electrode was studied. The results showed that，in pH 80 phosphate buffer solution（PBS），two pairs of redox peaks were observed on the modified electrode.The oxidation peak current was linear to scan rates in the range of 40-360 mV?s-1，indicating that the electrode process of PQ was controlled by absorption.The reaction electronic number and active area of PQ on PTA-MMT-［BMIM］PF6/GCE were obtained to be 2 and 0064 4 cm2，respectively.The effects of modifier dosage，buffer solution types and pH values for the determination of PQ were discussed.Under the optimized conditions，the correlation between peak current（Ipa） and PQ concentration was studied by square wave voltammetry，and a good linear relationship was obtained over PQ concentration in the range of 50×10-7-25×10-4 mol?L-1.The linear equation was Ipa（μA）=-1024-23683c（r=0999 3） and the detection limit was 207×10-7 mol?L-1.The spiked recoveries were in the range of 93%-104%.The modified electrode exhibited good repeatability and stability.