Abstract: In the trial,CTMAB method was used to modify bentonite and prepare organic bentonite,and the effect of modification was verified by wastewater organobentonite adsorption of TNT.The effect of CTMAB,oscillation frequency,time,pH and temperature on quality control of wastewater organobentonite was analsed,and orthogonal experiment was apply to determine the best preparation organobentonite conditions.Further,the use of single factor experiments was use to determine the impact of various factors on the outcome,the result was the sam as the orthogonal.The experimental results showed that the order of effecting organobentonite preparation was CTMAB concentration 〉pH value 〉oscillation frequency 〉temperature;The optimum conditions was CTMAB concentration of 2%,temperature of 60 ℃,oscillation frequency of 120 r/min,pH of 7,and the removal rate of TNT was the ideal reaching 96.02 %.