Abstract: CTMAB-bentonite was synthesized by inserting cetyltrimethylammonium bromide(CTMAB) into the interlayer of bentonite mineral that had been purified and Na-modified. The adsorption properties of the TMAB-bentonite to phenol in wastewater were investigated in detail. The phenol removal rate reached 78% at a phenol concentration of 50 mg/L in the wastewater under the conditions of pH value of 6.3,contact time of 50 minute,contact temperature of 35 ℃,and dosage of modified bentonite of 20 g/L.