Abstract: In this paper,the adsorption of rectorite purified and modified by dodecyl benyl dimethyl ammonium chloride（1227） for Cu²⁺ from copper smelter industry wastewater has been studied.The experimental results show that under the conditions without adjusting the pH,with the amount of organic modified rectorite of 0.03g/mL,the reaction time of 30 minutes,and the temperature of 25℃,the efficiency for modified rectorite to remove Cu²⁺ from copper smelter industry wastewater is 98.95%,and the quality indexes of the wastewater after treatment conform with the national discharge standards.The efficiency of Cu²⁺ removal with organic modified rectorite is better than with purified rectorite.