Abstract: The research concerns in the determination of the cation exchange capacity (CEC) of kaoline, montmorillonite, sepiolite and zeolite mineral treated by acid solution, alkali solution and heating at 80 ℃, respectively. The results indicate that the pH value and temperature of 80 ℃ all have influence on the CEC of clay mineral. And the CEC of the samples is mainly affected by their crystal structure. Acid, alkali and heating treatment corrosion resistances of zeolite, kaoline and sepiolite are better, while the montmorillonite’s are worse.