Fabrication of ionic liquid modified paste-carbon-electrodes (ILPCEs) and its application in measuring electrochemical properties of 2,4,6-trinitrotoluene (TNT) were investigated in this study. The modified electrodes were prepared by carbon powder (Cp) with ionic liquid 1-Butyl-3-methylimidazolium tetrafluoroborate [C4mim)][BF4] (IL) and parafin oil (PO) with different percentage of Cp/lL/PO in weight mixing ratios (percent w). Voltametric signals of 2,4,6trinitrotoluene in phosphate buffer solution 0.05 M with pH = 8 on these modified electrodes was recorded. The modified electrode with ratio Cp/lL/PO equal to 80: 10: 10 is confirmed to be the best in current signal measurement. In tenn of TNT electrochemical detection with 0.03-22 ppm concentration range, ILPCEs pointed out advantages over conventional glassy carbon electrode by lower detection limit, better perfonnance in signal collecting, more stable and higher reproducible response.